57920381 has 4 divisors (see below), whose sum is σ = 57993852. Its totient is φ = 57846912.

The previous prime is 57920353. The next prime is 57920383. The reversal of 57920381 is 18302975.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 27394756 + 30525625 = 5234^2 + 5525^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-57920381 is a prime.

It is a super-2 number, since 2×57920381² = 6709541070370322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57920383) 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, 35540 + ... + 37133.

It is an arithmetic number, because the mean of its divisors is an integer number (14498463).

Almost surely, 2^57920381 is an apocalyptic number.

It is an amenable number.

57920381 is a deficient number, since it is larger than the sum of its proper divisors (73471).

57920381 is an equidigital number, since it uses as much as digits as its factorization.

57920381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73470.

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 57920381 is about 7610.5440672793. The cubic root of 57920381 is about 386.9104592013.

The spelling of 57920381 in words is "fifty-seven million, nine hundred twenty thousand, three hundred eighty-one".