7972538 has 16 divisors (see below), whose sum is σ = 14037504. Its totient is φ = 3324240.

The previous prime is 7972511. The next prime is 7972553. The reversal of 7972538 is 8352797.

It is a super-2 number, since 2×7972538² = 127122724322888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7972495 and 7972504.

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, 7178 + ... + 8213.

It is an arithmetic number, because the mean of its divisors is an integer number (877344).

Almost surely, 2^7972538 is an apocalyptic number.

7972538 is a deficient number, since it is larger than the sum of its proper divisors (6064966).

7972538 is a wasteful number, since it uses less digits than its factorization.

7972538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15437.

The product of its digits is 105840, while the sum is 41.

The square root of 7972538 is about 2823.5683097811. The cubic root of 7972538 is about 199.7708876378.

The spelling of 7972538 in words is "seven million, nine hundred seventy-two thousand, five hundred thirty-eight".