57028397 has 4 divisors (see below), whose sum is σ = 57995040. Its totient is φ = 56061756.

The previous prime is 57028393. The next prime is 57028399. The reversal of 57028397 is 79382075.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 57028397 - 2² = 57028393 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 (57028393) 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, 483233 + ... + 483350.

It is an arithmetic number, because the mean of its divisors is an integer number (14498760).

Almost surely, 2^57028397 is an apocalyptic number.

It is an amenable number.

57028397 is a deficient number, since it is larger than the sum of its proper divisors (966643).

57028397 is an equidigital number, since it uses as much as digits as its factorization.

57028397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 966642.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 57028397 is about 7551.7148383662. The cubic root of 57028397 is about 384.9140123927.

The spelling of 57028397 in words is "fifty-seven million, twenty-eight thousand, three hundred ninety-seven".