7899120 has 200 divisors, whose sum is σ = 29167776. Its totient is φ = 1976832.

The previous prime is 7899113. The next prime is 7899127. The reversal of 7899120 is 219987.

7899120 = 575² + 576² + ... + 597².

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7899113) and next prime (7899127).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7899127) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 149014 + ... + 149066.

Almost surely, 2^7899120 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 7899120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14583888).

7899120 is an abundant number, since it is smaller than the sum of its proper divisors (21268656).

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

7899120 is a wasteful number, since it uses less digits than its factorization.

7899120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 101 (or 86 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 7899120 is about 2810.5373151766. The cubic root of 7899120 is about 199.1557747662.

The spelling of 7899120 in words is "seven million, eight hundred ninety-nine thousand, one hundred twenty".