57485780 has 48 divisors (see below), whose sum is σ = 135959040. Its totient is φ = 20227200.

The previous prime is 57485767. The next prime is 57485783. The reversal of 57485780 is 8758475.

It is a super-2 number, since 2×57485780² = 6609229804416800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57485783) 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, 2606 + ... + 11034.

It is an arithmetic number, because the mean of its divisors is an integer number (2832480).

Almost surely, 2^57485780 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57485780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67979520).

57485780 is an abundant number, since it is smaller than the sum of its proper divisors (78473260).

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

57485780 is a wasteful number, since it uses less digits than its factorization.

57485780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8480 (or 8478 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 44.

The square root of 57485780 is about 7581.9377470407. The cubic root of 57485780 is about 385.9403113161.

The spelling of 57485780 in words is "fifty-seven million, four hundred eighty-five thousand, seven hundred eighty".