57297766 has 4 divisors (see below), whose sum is σ = 85946652. Its totient is φ = 28648882.

The previous prime is 57297763. The next prime is 57297809. The reversal of 57297766 is 66779275.

It is a happy number.

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

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57297763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14324440 + ... + 14324443.

It is an arithmetic number, because the mean of its divisors is an integer number (21486663).

Almost surely, 2^57297766 is an apocalyptic number.

57297766 is a deficient number, since it is larger than the sum of its proper divisors (28648886).

57297766 is a wasteful number, since it uses less digits than its factorization.

57297766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28648885.

The product of its digits is 1111320, while the sum is 49.

The square root of 57297766 is about 7569.5287832203. The cubic root of 57297766 is about 385.5190973889.

The spelling of 57297766 in words is "fifty-seven million, two hundred ninety-seven thousand, seven hundred sixty-six".