7972428 has 12 divisors (see below), whose sum is σ = 18602360. Its totient is φ = 2657472.

The previous prime is 7972417. The next prime is 7972429. The reversal of 7972428 is 8242797.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7972429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 332173 + ... + 332196.

Almost surely, 2^7972428 is an apocalyptic number.

It is an amenable number.

7972428 is an abundant number, since it is smaller than the sum of its proper divisors (10629932).

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

7972428 is a wasteful number, since it uses less digits than its factorization.

7972428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 664376 (or 664374 counting only the distinct ones).

The product of its digits is 56448, while the sum is 39.

The square root of 7972428 is about 2823.5488308156. The cubic root of 7972428 is about 199.7699688631.

The spelling of 7972428 in words is "seven million, nine hundred seventy-two thousand, four hundred twenty-eight".