57782820 has 24 divisors (see below), whose sum is σ = 161792064. Its totient is φ = 15408736.

The previous prime is 57782783. The next prime is 57782821. The reversal of 57782820 is 2828775.

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

It is not an unprimeable number, because it can be changed into a prime (57782821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 481464 + ... + 481583.

It is an arithmetic number, because the mean of its divisors is an integer number (6741336).

Almost surely, 2^57782820 is an apocalyptic number.

It is an amenable number.

57782820 is an abundant number, since it is smaller than the sum of its proper divisors (104009244).

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

57782820 is a wasteful number, since it uses less digits than its factorization.

57782820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963059 (or 963057 counting only the distinct ones).

The product of its (nonzero) digits is 62720, while the sum is 39.

The square root of 57782820 is about 7601.5011675326. The cubic root of 57782820 is about 386.6039120644.

The spelling of 57782820 in words is "fifty-seven million, seven hundred eighty-two thousand, eight hundred twenty".