972805724 has 12 divisors (see below), whose sum is σ = 1857174648. Its totient is φ = 442184400.

The previous prime is 972805711. The next prime is 972805753. The reversal of 972805724 is 427508279.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 22109221 = 972805724 / (9 + 7 + 2 + 8 + 0 + 5 + 7 + 2 + 4).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11054567 + ... + 11054654.

It is an arithmetic number, because the mean of its divisors is an integer number (154764554).

Almost surely, 2^972805724 is an apocalyptic number.

It is an amenable number.

972805724 is a deficient number, since it is larger than the sum of its proper divisors (884368924).

972805724 is a wasteful number, since it uses less digits than its factorization.

972805724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22109236 (or 22109234 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 972805724 is about 31189.8336641926. The cubic root of 972805724 is about 990.8518071024.

The spelling of 972805724 in words is "nine hundred seventy-two million, eight hundred five thousand, seven hundred twenty-four".