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253587680 = 2551983417
BaseRepresentation
bin11110001110101…
…11000011100000
3122200011120220022
433013113003200
51004404301210
641055133012
76166313453
oct1707270340
9580146808
10253587680
111201641a5
1270b14168
13406ca6a8
142597149a
15173e2155
hexf1d70e0

253587680 has 48 divisors (see below), whose sum is σ = 630640080. Its totient is φ = 96095232.

The previous prime is 253587667. The next prime is 253587713. The reversal of 253587680 is 86785352.

253587680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×2535876802 = 128613422895564800, which contains 22 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, 38669 + ... + 44748.

It is an arithmetic number, because the mean of its divisors is an integer number (13138335).

Almost surely, 2253587680 is an apocalyptic number.

253587680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

253587680 is an abundant number, since it is smaller than the sum of its proper divisors (377052400).

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

253587680 is a wasteful number, since it uses less digits than its factorization.

253587680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83451 (or 83443 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 44.

The square root of 253587680 is about 15924.4365677408. The cubic root of 253587680 is about 632.9596860356.

The spelling of 253587680 in words is "two hundred fifty-three million, five hundred eighty-seven thousand, six hundred eighty".

Divisors: 1 2 4 5 8 10 16 19 20 32 38 40 76 80 95 152 160 190 304 380 608 760 1520 3040 83417 166834 333668 417085 667336 834170 1334672 1584923 1668340 2669344 3169846 3336680 6339692 6673360 7924615 12679384 13346720 15849230 25358768 31698460 50717536 63396920 126793840 253587680