7889972 has 24 divisors (see below), whose sum is σ = 15127560. Its totient is φ = 3584000.

The previous prime is 7889957. The next prime is 7889977. The reversal of 7889972 is 2799887.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 524176 + 7365796 = 724^2 + 2714^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 7889972.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7889977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29 + ... + 3972.

It is an arithmetic number, because the mean of its divisors is an integer number (630315).

Almost surely, 2^7889972 is an apocalyptic number.

It is an amenable number.

7889972 is a deficient number, since it is larger than the sum of its proper divisors (7237588).

7889972 is a wasteful number, since it uses less digits than its factorization.

7889972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4051 (or 4049 counting only the distinct ones).

The product of its digits is 508032, while the sum is 50.

The square root of 7889972 is about 2808.9093969012. The cubic root of 7889972 is about 199.0788640560.

The spelling of 7889972 in words is "seven million, eight hundred eighty-nine thousand, nine hundred seventy-two".