8991372 has 24 divisors (see below), whose sum is σ = 22594096. Its totient is φ = 2766528.

The previous prime is 8991371. The next prime is 8991377. The reversal of 8991372 is 2731998.

It is a Smith number, since the sum of its digits (39) 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 (39).

It is a self number, because there is not a number n which added to its sum of digits gives 8991372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8991371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28663 + ... + 28974.

Almost surely, 2^8991372 is an apocalyptic number.

It is an amenable number.

8991372 is an abundant number, since it is smaller than the sum of its proper divisors (13602724).

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

8991372 is a wasteful number, since it uses less digits than its factorization.

8991372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57657 (or 57655 counting only the distinct ones).

The product of its digits is 27216, while the sum is 39.

The square root of 8991372 is about 2998.5616551940. The cubic root of 8991372 is about 207.9418908188.

The spelling of 8991372 in words is "eight million, nine hundred ninety-one thousand, three hundred seventy-two".