56349728 has 18 divisors (see below), whose sum is σ = 111022191. Its totient is φ = 28153632.

The previous prime is 56349721. The next prime is 56349749. The reversal of 56349728 is 82794365.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 28174864 + 28174864 = 5308^2 + 5308^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5308.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56349721) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 41801 + ... + 43127.

Almost surely, 2^56349728 is an apocalyptic number.

It is an amenable number.

56349728 is a deficient number, since it is larger than the sum of its proper divisors (54672463).

56349728 is an frugal number, since it uses more digits than its factorization.

56349728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664 (or 1329 counting only the distinct ones).

The product of its digits is 362880, while the sum is 44.

The square root of 56349728 is about 7506.6455890764. The cubic root of 56349728 is about 383.3810195665.

The spelling of 56349728 in words is "fifty-six million, three hundred forty-nine thousand, seven hundred twenty-eight".