57981738 has 32 divisors (see below), whose sum is σ = 121653504. Its totient is φ = 18401472.

The previous prime is 57981727. The next prime is 57981739. The reversal of 57981738 is 83718975.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (57981739) 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, 7656 + ... + 13212.

It is an arithmetic number, because the mean of its divisors is an integer number (3801672).

Almost surely, 2^57981738 is an apocalyptic number.

57981738 is an abundant number, since it is smaller than the sum of its proper divisors (63671766).

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

57981738 is a wasteful number, since it uses less digits than its factorization.

57981738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5646.

The product of its digits is 423360, while the sum is 48.

The square root of 57981738 is about 7614.5740524339. The cubic root of 57981738 is about 387.0470333905.

The spelling of 57981738 in words is "fifty-seven million, nine hundred eighty-one thousand, seven hundred thirty-eight".