57402449 has 4 divisors (see below), whose sum is σ = 61818036. Its totient is φ = 52986864.

The previous prime is 57402437. The next prime is 57402469. The reversal of 57402449 is 94420475.

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 16851025 + 40551424 = 4105^2 + 6368^2 .

It is a cyclic number.

It is not a de Polignac number, because 57402449 - 2⁸ = 57402193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57402469) 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, 2207774 + ... + 2207799.

It is an arithmetic number, because the mean of its divisors is an integer number (15454509).

Almost surely, 2^57402449 is an apocalyptic number.

It is an amenable number.

57402449 is a deficient number, since it is larger than the sum of its proper divisors (4415587).

57402449 is a wasteful number, since it uses less digits than its factorization.

57402449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4415586.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 57402449 is about 7576.4403911072. The cubic root of 57402449 is about 385.7537356410.

The spelling of 57402449 in words is "fifty-seven million, four hundred two thousand, four hundred forty-nine".