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253838620 = 22572259019
BaseRepresentation
bin11110010000101…
…00010100011100
3122200122100010101
433020110110130
51004440313440
641104350444
76201410200
oct1710242434
9580570111
10253838620
11120315792
1271015424
1340787989
14259d8b00
151744169a
hexf21451c

253838620 has 36 divisors (see below), whose sum is σ = 620093880. Its totient is φ = 87030048.

The previous prime is 253838617. The next prime is 253838639. The reversal of 253838620 is 26838352.

It is a self number, because there is not a number n which added to its sum of digits gives 253838620.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 128530 + ... + 130489.

It is an arithmetic number, because the mean of its divisors is an integer number (17224830).

Almost surely, 2253838620 is an apocalyptic number.

253838620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253838620 is an abundant number, since it is smaller than the sum of its proper divisors (366255260).

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

253838620 is a wasteful number, since it uses less digits than its factorization.

253838620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 259042 (or 259033 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 37.

The square root of 253838620 is about 15932.3137051716. The cubic root of 253838620 is about 633.1684008809.

The spelling of 253838620 in words is "two hundred fifty-three million, eight hundred thirty-eight thousand, six hundred twenty".

Divisors: 1 2 4 5 7 10 14 20 28 35 49 70 98 140 196 245 490 980 259019 518038 1036076 1295095 1813133 2590190 3626266 5180380 7252532 9065665 12691931 18131330 25383862 36262660 50767724 63459655 126919310 253838620