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620023808 = 2121931257
BaseRepresentation
bin100100111101001…
…101000000000000
31121012200110202202
4210331031000000
52232211230213
6141305132332
721236054405
oct4475150000
91535613682
10620023808
11298a95078
1215378a0a8
139b5b9ac1
145c4ba2ac
1539675b58
hex24f4d000

620023808 has 104 divisors (see below), whose sum is σ = 1352497920. Its totient is φ = 283115520.

The previous prime is 620023757. The next prime is 620023823. The reversal of 620023808 is 808320026.

It is a super-3 number, since 3×6200238083 (a number of 27 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2412416 + ... + 2412672.

Almost surely, 2620023808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 620023808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (676248960).

620023808 is an abundant number, since it is smaller than the sum of its proper divisors (732474112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

620023808 is a wasteful number, since it uses less digits than its factorization.

620023808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331 (or 309 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 29.

The square root of 620023808 is about 24900.2772675326. The cubic root of 620023808 is about 852.7128127728.

The spelling of 620023808 in words is "six hundred twenty million, twenty-three thousand, eight hundred eight".

Divisors: 1 2 4 8 16 19 31 32 38 62 64 76 124 128 152 248 256 257 304 496 512 514 589 608 992 1024 1028 1178 1216 1984 2048 2056 2356 2432 3968 4096 4112 4712 4864 4883 7936 7967 8224 9424 9728 9766 15872 15934 16448 18848 19456 19532 31744 31868 32896 37696 38912 39064 63488 63736 65792 75392 77824 78128 126976 127472 131584 150784 151373 156256 254944 263168 301568 302746 312512 509888 526336 603136 605492 625024 1019776 1052672 1206272 1210984 1250048 2039552 2412544 2421968 2500096 4079104 4843936 5000192 8158208 9687872 10000384 16316416 19375744 20000768 32632832 38751488 77502976 155005952 310011904 620023808