57640902 has 32 divisors (see below), whose sum is σ = 127021824. Its totient is φ = 17292000.

The previous prime is 57640901. The next prime is 57640949. The reversal of 57640902 is 20904675.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57640901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2343 + ... + 10989.

It is an arithmetic number, because the mean of its divisors is an integer number (3969432).

Almost surely, 2^57640902 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57640902, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63510912).

57640902 is an abundant number, since it is smaller than the sum of its proper divisors (69380922).

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

57640902 is a wasteful number, since it uses less digits than its factorization.

57640902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8764.

The product of its (nonzero) digits is 15120, while the sum is 33.

The square root of 57640902 is about 7592.1605620535. The cubic root of 57640902 is about 386.2871452845.

The spelling of 57640902 in words is "fifty-seven million, six hundred forty thousand, nine hundred two".