972012728 has 32 divisors (see below), whose sum is σ = 1858032000. Its totient is φ = 476579040.

The previous prime is 972012709. The next prime is 972012733. The reversal of 972012728 is 827210279.

It is a junction number, because it is equal to n+sod(n) for n = 972012691 and 972012700.

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, 204863 + ... + 209553.

It is an arithmetic number, because the mean of its divisors is an integer number (58063500).

Almost surely, 2^972012728 is an apocalyptic number.

It is an amenable number.

972012728 is a deficient number, since it is larger than the sum of its proper divisors (886019272).

972012728 is a wasteful number, since it uses less digits than its factorization.

972012728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5195 (or 5191 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 972012728 is about 31177.1186609667. The cubic root of 972012728 is about 990.5824984077.

The spelling of 972012728 in words is "nine hundred seventy-two million, twelve thousand, seven hundred twenty-eight".