57320642 has 4 divisors (see below), whose sum is σ = 85980966. Its totient is φ = 28660320.

The previous prime is 57320621. The next prime is 57320647. The reversal of 57320642 is 24602375.

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., 38925121 + 18395521 = 6239^2 + 4289^2 .

It is not an unprimeable number, because it can be changed into a prime (57320647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14330159 + ... + 14330162.

Almost surely, 2^57320642 is an apocalyptic number.

57320642 is a deficient number, since it is larger than the sum of its proper divisors (28660324).

57320642 is a wasteful number, since it uses less digits than its factorization.

57320642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28660323.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 57320642 is about 7571.0396908219. The cubic root of 57320642 is about 385.5703964306.

The spelling of 57320642 in words is "fifty-seven million, three hundred twenty thousand, six hundred forty-two".