57780372 has 24 divisors (see below), whose sum is σ = 145192096. Its totient is φ = 17778528.

The previous prime is 57780341. The next prime is 57780391. The reversal of 57780372 is 27308775.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 57780372.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 185038 + ... + 185349.

Almost surely, 2^57780372 is an apocalyptic number.

57780372 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

57780372 is an abundant number, since it is smaller than the sum of its proper divisors (87411724).

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

57780372 is a wasteful number, since it uses less digits than its factorization.

57780372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 370407 (or 370405 counting only the distinct ones).

The product of its (nonzero) digits is 82320, while the sum is 39.

The square root of 57780372 is about 7601.3401450007. The cubic root of 57780372 is about 386.5984524269.

The spelling of 57780372 in words is "fifty-seven million, seven hundred eighty thousand, three hundred seventy-two".