57239823 has 8 divisors (see below), whose sum is σ = 78951600. Its totient is φ = 36843968.

The previous prime is 57239821. The next prime is 57239827. The reversal of 57239823 is 32893275.

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 57239823 - 2¹ = 57239821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57239821) 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, 328878 + ... + 329051.

It is an arithmetic number, because the mean of its divisors is an integer number (9868950).

Almost surely, 2^57239823 is an apocalyptic number.

57239823 is a deficient number, since it is larger than the sum of its proper divisors (21711777).

57239823 is a wasteful number, since it uses less digits than its factorization.

57239823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 657961.

The product of its digits is 90720, while the sum is 39.

The square root of 57239823 is about 7565.7004302312. The cubic root of 57239823 is about 385.3891000740.

The spelling of 57239823 in words is "fifty-seven million, two hundred thirty-nine thousand, eight hundred twenty-three".