56728340 has 24 divisors (see below), whose sum is σ = 119387520. Its totient is φ = 22642208.

The previous prime is 56728283. The next prime is 56728351. The reversal of 56728340 is 4382765.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 56728340.

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, 7241 + ... + 12879.

It is an arithmetic number, because the mean of its divisors is an integer number (4974480).

Almost surely, 2^56728340 is an apocalyptic number.

It is an amenable number.

56728340 is an abundant number, since it is smaller than the sum of its proper divisors (62659180).

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

56728340 is a wasteful number, since it uses less digits than its factorization.

56728340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6151 (or 6149 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 56728340 is about 7531.8218247646. The cubic root of 56728340 is about 384.2377452083.

The spelling of 56728340 in words is "fifty-six million, seven hundred twenty-eight thousand, three hundred forty".