57891239 has 8 divisors (see below), whose sum is σ = 70053408. Its totient is φ = 46702080.

The previous prime is 57891227. The next prime is 57891241. The reversal of 57891239 is 93219875.

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 57891239 - 2⁸ = 57890983 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 57891239.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57891209) 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, 243122 + ... + 243359.

It is an arithmetic number, because the mean of its divisors is an integer number (8756676).

Almost surely, 2^57891239 is an apocalyptic number.

57891239 is a deficient number, since it is larger than the sum of its proper divisors (12162169).

57891239 is a wasteful number, since it uses less digits than its factorization.

57891239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 486505.

The product of its digits is 136080, while the sum is 44.

The square root of 57891239 is about 7608.6292457972. The cubic root of 57891239 is about 386.8455584072.

The spelling of 57891239 in words is "fifty-seven million, eight hundred ninety-one thousand, two hundred thirty-nine".