57486780 has 192 divisors, whose sum is σ = 203212800. Its totient is φ = 13374720.

The previous prime is 57486773. The next prime is 57486811. The reversal of 57486780 is 8768475.

57486780 is a `hidden beast` number, since 574 + 8 + 6 + 78 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 133165 + ... + 133595.

It is an arithmetic number, because the mean of its divisors is an integer number (1058400).

Almost surely, 2^57486780 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 57486780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101606400).

57486780 is an abundant number, since it is smaller than the sum of its proper divisors (145726020).

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

57486780 is a wasteful number, since it uses less digits than its factorization.

57486780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481 (or 473 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 45.

The square root of 57486780 is about 7582.0036929561. The cubic root of 57486780 is about 385.9425491917.

The spelling of 57486780 in words is "fifty-seven million, four hundred eighty-six thousand, seven hundred eighty".