7972440 has 64 divisors (see below), whose sum is σ = 27336960. Its totient is φ = 1822080.

The previous prime is 7972429. The next prime is 7972451. The reversal of 7972440 is 442797.

It is an interprime number because it is at equal distance from previous prime (7972429) and next prime (7972451).

It is a nialpdrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3906 + ... + 5585.

It is an arithmetic number, because the mean of its divisors is an integer number (427140).

Almost surely, 2^7972440 is an apocalyptic number.

7972440 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7972440 is an abundant number, since it is smaller than the sum of its proper divisors (19364520).

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

7972440 is a wasteful number, since it uses less digits than its factorization.

7972440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9512 (or 9508 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 33.

The square root of 7972440 is about 2823.5509558002. The cubic root of 7972440 is about 199.7700690935.

The spelling of 7972440 in words is "seven million, nine hundred seventy-two thousand, four hundred forty".