57640049 has 4 divisors (see below), whose sum is σ = 58287780. Its totient is φ = 56992320.

The previous prime is 57640027. The next prime is 57640061. The reversal of 57640049 is 94004675.

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

It can be written as a sum of positive squares in 2 ways, for example, as 39150049 + 18490000 = 6257^2 + 4300^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57640049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57640249) 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, 323732 + ... + 323909.

It is an arithmetic number, because the mean of its divisors is an integer number (14571945).

Almost surely, 2^57640049 is an apocalyptic number.

It is an amenable number.

57640049 is a deficient number, since it is larger than the sum of its proper divisors (647731).

57640049 is an equidigital number, since it uses as much as digits as its factorization.

57640049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647730.

The product of its (nonzero) digits is 30240, while the sum is 35.

The square root of 57640049 is about 7592.1043854784. The cubic root of 57640049 is about 386.2852397825.

The spelling of 57640049 in words is "fifty-seven million, six hundred forty thousand, forty-nine".