2391158172 has 48 divisors (see below), whose sum is σ = 6011655552. Its totient is φ = 735360960.

The previous prime is 2391158117. The next prime is 2391158183. The reversal of 2391158172 is 2718511932.

It is a happy number.

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 2391158172.

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, 523603 + ... + 528149.

It is an arithmetic number, because the mean of its divisors is an integer number (125242824).

Almost surely, 2^2391158172 is an apocalyptic number.

It is an amenable number.

2391158172 is an abundant number, since it is smaller than the sum of its proper divisors (3620497380).

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

2391158172 is a wasteful number, since it uses less digits than its factorization.

2391158172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7938 (or 7936 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 2391158172 is about 48899.4700584781. The cubic root of 2391158172 is about 1337.2197072063.

The spelling of 2391158172 in words is "two billion, three hundred ninety-one million, one hundred fifty-eight thousand, one hundred seventy-two".