57804981 has 16 divisors (see below), whose sum is σ = 87885504. Its totient is φ = 33479424.

The previous prime is 57804979. The next prime is 57804983. The reversal of 57804981 is 18940875.

It is an interprime number because it is at equal distance from previous prime (57804979) and next prime (57804983).

It is not a de Polignac number, because 57804981 - 2¹ = 57804979 is a prime.

It is a super-2 number, since 2×57804981² = 6682831656820722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57804983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42931 + ... + 44256.

It is an arithmetic number, because the mean of its divisors is an integer number (5492844).

Almost surely, 2^57804981 is an apocalyptic number.

57804981 is a gapful number since it is divisible by the number (51) formed by its first and last digit.

It is an amenable number.

57804981 is a deficient number, since it is larger than the sum of its proper divisors (30080523).

57804981 is a wasteful number, since it uses less digits than its factorization.

57804981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87220.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 57804981 is about 7602.9587004008. The cubic root of 57804981 is about 386.6533294878.

It can be divided in two parts, 57804 and 981, that added together give a palindrome (58785).

The spelling of 57804981 in words is "fifty-seven million, eight hundred four thousand, nine hundred eighty-one".