57398731 has 8 divisors (see below), whose sum is σ = 64501920. Its totient is φ = 50679552.

The previous prime is 57398717. The next prime is 57398807. The reversal of 57398731 is 13789375.

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

It is a cyclic number.

It is not a de Polignac number, because 57398731 - 2¹⁷ = 57267659 is a prime.

It is a super-2 number, since 2×57398731² = 6589228640820722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (57398711) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95686 + ... + 96283.

It is an arithmetic number, because the mean of its divisors is an integer number (8062740).

Almost surely, 2^57398731 is an apocalyptic number.

57398731 is a deficient number, since it is larger than the sum of its proper divisors (7103189).

57398731 is a wasteful number, since it uses less digits than its factorization.

57398731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192005.

The product of its digits is 158760, while the sum is 43.

The square root of 57398731 is about 7576.1950212491. The cubic root of 57398731 is about 385.7454069409.

The spelling of 57398731 in words is "fifty-seven million, three hundred ninety-eight thousand, seven hundred thirty-one".