57278502 has 48 divisors (see below), whose sum is σ = 135495360. Its totient is φ = 18085032.

The previous prime is 57278489. The next prime is 57278503. The reversal of 57278502 is 20587275.

57278502 is a `hidden beast` number, since 572 + 7 + 85 + 0 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (57278503) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6133 + ... + 12335.

It is an arithmetic number, because the mean of its divisors is an integer number (2822820).

Almost surely, 2^57278502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 57278502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67747680).

57278502 is an abundant number, since it is smaller than the sum of its proper divisors (78216858).

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

57278502 is a wasteful number, since it uses less digits than its factorization.

57278502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6239 (or 6227 counting only the distinct ones).

The product of its (nonzero) digits is 39200, while the sum is 36.

The square root of 57278502 is about 7568.2562060226. The cubic root of 57278502 is about 385.4758876045.

The spelling of 57278502 in words is "fifty-seven million, two hundred seventy-eight thousand, five hundred two".