57270391 has 8 divisors (see below), whose sum is σ = 60094944. Its totient is φ = 54473760.

The previous prime is 57270371. The next prime is 57270403. The reversal of 57270391 is 19307275.

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

It is a de Polignac number, because none of the positive numbers 2^k-57270391 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57270371) 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, 2716 + ... + 11041.

It is an arithmetic number, because the mean of its divisors is an integer number (7511868).

Almost surely, 2^57270391 is an apocalyptic number.

57270391 is a deficient number, since it is larger than the sum of its proper divisors (2824553).

57270391 is a wasteful number, since it uses less digits than its factorization.

57270391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13961.

The product of its (nonzero) digits is 13230, while the sum is 34.

The square root of 57270391 is about 7567.7203304562. The cubic root of 57270391 is about 385.4576914668.

The spelling of 57270391 in words is "fifty-seven million, two hundred seventy thousand, three hundred ninety-one".