57978791 has 16 divisors (see below), whose sum is σ = 65533440. Its totient is φ = 50893920.

The previous prime is 57978787. The next prime is 57978793. The reversal of 57978791 is 19787975.

It is a cyclic number.

It is not a de Polignac number, because 57978791 - 2² = 57978787 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57978793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62630 + ... + 63548.

It is an arithmetic number, because the mean of its divisors is an integer number (4095840).

Almost surely, 2^57978791 is an apocalyptic number.

57978791 is a deficient number, since it is larger than the sum of its proper divisors (7554649).

57978791 is a wasteful number, since it uses less digits than its factorization.

57978791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1166.

The product of its digits is 1111320, while the sum is 53.

The square root of 57978791 is about 7614.3805394792. The cubic root of 57978791 is about 387.0404758837.

The spelling of 57978791 in words is "fifty-seven million, nine hundred seventy-eight thousand, seven hundred ninety-one".