57398691 has 8 divisors (see below), whose sum is σ = 87464704. Its totient is φ = 32799240.

The previous prime is 57398687. The next prime is 57398711. The reversal of 57398691 is 19689375.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 57398691 - 2² = 57398687 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 57398691.

It is not an unprimeable number, because it can be changed into a prime (57398611) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1366615 + ... + 1366656.

It is an arithmetic number, because the mean of its divisors is an integer number (10933088).

Almost surely, 2^57398691 is an apocalyptic number.

57398691 is a deficient number, since it is larger than the sum of its proper divisors (30066013).

57398691 is a wasteful number, since it uses less digits than its factorization.

57398691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2733281.

The product of its digits is 408240, while the sum is 48.

The square root of 57398691 is about 7576.1923814011. The cubic root of 57398691 is about 385.7453173348.

The spelling of 57398691 in words is "fifty-seven million, three hundred ninety-eight thousand, six hundred ninety-one".