57262640 has 40 divisors (see below), whose sum is σ = 138928608. Its totient is φ = 21908480.

The previous prime is 57262633. The next prime is 57262651. The reversal of 57262640 is 4626275.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 57262597 and 57262606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13721 + ... + 17400.

Almost surely, 2^57262640 is an apocalyptic number.

It is an amenable number.

57262640 is an abundant number, since it is smaller than the sum of its proper divisors (81665968).

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

57262640 is a wasteful number, since it uses less digits than its factorization.

57262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31157 (or 31151 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 57262640 is about 7567.2082038226. The cubic root of 57262640 is about 385.4403013442.

The spelling of 57262640 in words is "fifty-seven million, two hundred sixty-two thousand, six hundred forty".