57288647 has 4 divisors (see below), whose sum is σ = 61695480. Its totient is φ = 52881816.

The previous prime is 57288619. The next prime is 57288683. The reversal of 57288647 is 74688275.

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

It is not a de Polignac number, because 57288647 - 2¹⁰ = 57287623 is a prime.

It is a super-4 number, since 4×57288647⁴ (a number of 32 digits) contains 4444 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57288047) 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, 2203397 + ... + 2203422.

It is an arithmetic number, because the mean of its divisors is an integer number (15423870).

Almost surely, 2^57288647 is an apocalyptic number.

57288647 is a deficient number, since it is larger than the sum of its proper divisors (4406833).

57288647 is a wasteful number, since it uses less digits than its factorization.

57288647 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4406832.

The product of its digits is 752640, while the sum is 47.

The square root of 57288647 is about 7568.9264100003. The cubic root of 57288647 is about 385.4986443799.

The spelling of 57288647 in words is "fifty-seven million, two hundred eighty-eight thousand, six hundred forty-seven".