7997400 has 96 divisors (see below), whose sum is σ = 27565200. Its totient is φ = 2131200.

The previous prime is 7997393. The next prime is 7997447. The reversal of 7997400 is 47997.

7997400 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4660 + ... + 6140.

Almost surely, 2^7997400 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7997400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13782600).

7997400 is an abundant number, since it is smaller than the sum of its proper divisors (19567800).

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

7997400 is a wasteful number, since it uses less digits than its factorization.

7997400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1506 (or 1491 counting only the distinct ones).

The product of its (nonzero) digits is 15876, while the sum is 36.

The square root of 7997400 is about 2827.9674679883. The cubic root of 7997400 is about 199.9783309857.

It can be divided in two parts, 79 and 97400, that added together give a palindrome (97479).

The spelling of 7997400 in words is "seven million, nine hundred ninety-seven thousand, four hundred".