57081000 has 128 divisors (see below), whose sum is σ = 181958400. Its totient is φ = 14892800.

The previous prime is 57080999. The next prime is 57081029. The reversal of 57081000 is 18075.

It is a happy number.

It is a super-2 number, since 2×57081000² = 6516481122000000, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 158821 + ... + 159179.

It is an arithmetic number, because the mean of its divisors is an integer number (1421550).

Almost surely, 2^57081000 is an apocalyptic number.

57081000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57081000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90979200).

57081000 is an abundant number, since it is smaller than the sum of its proper divisors (124877400).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

57081000 is a wasteful number, since it uses less digits than its factorization.

57081000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 436 (or 422 counting only the distinct ones).

The product of its (nonzero) digits is 280, while the sum is 21.

The square root of 57081000 is about 7555.1968869117. The cubic root of 57081000 is about 385.0323242664.

Adding to 57081000 its reverse (18075), we get a palindrome (57099075).

The spelling of 57081000 in words is "fifty-seven million, eighty-one thousand".