57449387 has 4 divisors (see below), whose sum is σ = 57702696. Its totient is φ = 57196080.

The previous prime is 57449347. The next prime is 57449461. The reversal of 57449387 is 78394475.

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

It is a cyclic number.

It is not a de Polignac number, because 57449387 - 2²⁴ = 40672171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57449347) 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, 126314 + ... + 126767.

It is an arithmetic number, because the mean of its divisors is an integer number (14425674).

Almost surely, 2^57449387 is an apocalyptic number.

57449387 is a deficient number, since it is larger than the sum of its proper divisors (253309).

57449387 is a wasteful number, since it uses less digits than its factorization.

57449387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253308.

The product of its digits is 846720, while the sum is 47.

The square root of 57449387 is about 7579.5373869386. The cubic root of 57449387 is about 385.8588506443.

The spelling of 57449387 in words is "fifty-seven million, four hundred forty-nine thousand, three hundred eighty-seven".