57681906 has 16 divisors (see below), whose sum is σ = 115528800. Its totient is φ = 19199808.

The previous prime is 57681893. The next prime is 57681919. The reversal of 57681906 is 60918675.

It is an interprime number because it is at equal distance from previous prime (57681893) and next prime (57681919).

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, 2071 + ... + 10938.

It is an arithmetic number, because the mean of its divisors is an integer number (7220550).

Almost surely, 2^57681906 is an apocalyptic number.

57681906 is an abundant number, since it is smaller than the sum of its proper divisors (57846894).

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

57681906 is a wasteful number, since it uses less digits than its factorization.

57681906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13753.

The product of its (nonzero) digits is 90720, while the sum is 42.

The square root of 57681906 is about 7594.8604990480. The cubic root of 57681906 is about 386.3787212498.

The spelling of 57681906 in words is "fifty-seven million, six hundred eighty-one thousand, nine hundred six".