56197728 has 36 divisors (see below), whose sum is σ = 159813108. Its totient is φ = 18732480.

The previous prime is 56197721. The next prime is 56197753. The reversal of 56197728 is 82779165.

56197728 is a `hidden beast` number, since 5 + 619 + 7 + 7 + 28 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (56197721) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 97278 + ... + 97853.

It is an arithmetic number, because the mean of its divisors is an integer number (4439253).

Almost surely, 2^56197728 is an apocalyptic number.

It is an amenable number.

56197728 is an abundant number, since it is smaller than the sum of its proper divisors (103615380).

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

56197728 is a wasteful number, since it uses less digits than its factorization.

56197728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195147 (or 195136 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 56197728 is about 7496.5143900349. The cubic root of 56197728 is about 383.0359934087.

It can be divided in two parts, 561 and 97728, that added together give a palindrome (98289).

The spelling of 56197728 in words is "fifty-six million, one hundred ninety-seven thousand, seven hundred twenty-eight".