57113978 has 4 divisors (see below), whose sum is σ = 85670970. Its totient is φ = 28556988.

The previous prime is 57113971. The next prime is 57113989. The reversal of 57113978 is 87931175.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 54213769 + 2900209 = 7363^2 + 1703^2 .

It is not an unprimeable number, because it can be changed into a prime (57113971) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14278493 + ... + 14278496.

Almost surely, 2^57113978 is an apocalyptic number.

57113978 is a deficient number, since it is larger than the sum of its proper divisors (28556992).

57113978 is a wasteful number, since it uses less digits than its factorization.

57113978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28556991.

The product of its digits is 52920, while the sum is 41.

The square root of 57113978 is about 7557.3790430281. The cubic root of 57113978 is about 385.1064595681.

The spelling of 57113978 in words is "fifty-seven million, one hundred thirteen thousand, nine hundred seventy-eight".