56728448 has 32 divisors (see below), whose sum is σ = 129160560. Its totient is φ = 24311808.

The previous prime is 56728429. The next prime is 56728453. The reversal of 56728448 is 84482765.

It is a tau number, because it is divible by the number of its divisors (32).

It is a junction number, because it is equal to n+sod(n) for n = 56728399 and 56728408.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30761 + ... + 32552.

Almost surely, 2^56728448 is an apocalyptic number.

It is an amenable number.

56728448 is an abundant number, since it is smaller than the sum of its proper divisors (72432112).

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

56728448 is an equidigital number, since it uses as much as digits as its factorization.

56728448 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63334 (or 63322 counting only the distinct ones).

The product of its digits is 430080, while the sum is 44.

The square root of 56728448 is about 7531.8289943413. The cubic root of 56728448 is about 384.2379890468.

The spelling of 56728448 in words is "fifty-six million, seven hundred twenty-eight thousand, four hundred forty-eight".