57991738 has 8 divisors (see below), whose sum is σ = 99414432. Its totient is φ = 24853596.

The previous prime is 57991733. The next prime is 57991751. The reversal of 57991738 is 83719975.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 57991691 and 57991700.

It is not an unprimeable number, because it can be changed into a prime (57991733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2071120 + ... + 2071147.

It is an arithmetic number, because the mean of its divisors is an integer number (12426804).

Almost surely, 2^57991738 is an apocalyptic number.

57991738 is a deficient number, since it is larger than the sum of its proper divisors (41422694).

57991738 is a wasteful number, since it uses less digits than its factorization.

57991738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4142276.

The product of its digits is 476280, while the sum is 49.

The square root of 57991738 is about 7615.2306596714. The cubic root of 57991738 is about 387.0692831999.

The spelling of 57991738 in words is "fifty-seven million, nine hundred ninety-one thousand, seven hundred thirty-eight".