7991552 has 72 divisors (see below), whose sum is σ = 17660160. Its totient is φ = 3594240.

The previous prime is 7991537. The next prime is 7991563. The reversal of 7991552 is 2551997.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (38).

Its product of digits (28350) is a multiple of the sum of its prime divisors (105).

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, 150758 + ... + 150810.

It is an arithmetic number, because the mean of its divisors is an integer number (245280).

Almost surely, 2^7991552 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 7991552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8830080).

7991552 is an abundant number, since it is smaller than the sum of its proper divisors (9668608).

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

7991552 is a wasteful number, since it uses less digits than its factorization.

7991552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119 (or 105 counting only the distinct ones).

The product of its digits is 28350, while the sum is 38.

The square root of 7991552 is about 2826.9333207559. The cubic root of 7991552 is about 199.9295752047.

The spelling of 7991552 in words is "seven million, nine hundred ninety-one thousand, five hundred fifty-two".