2391405604 has 45 divisors (see below), whose sum is σ = 4891966107. Its totient is φ = 1022834232.

The previous prime is 2391405593. The next prime is 2391405619. The reversal of 2391405604 is 4065041932.

It is a happy number.

The square root of 2391405604 is 48902.

It is a perfect power (a square), and thus also a powerful number.

It is a self number, because there is not a number n which added to its sum of digits gives 2391405604.

It is an unprimeable number.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 4792147 + ... + 4792645.

Almost surely, 2^2391405604 is an apocalyptic number.

2391405604 is the 48902-nd square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2391405604

2391405604 is an abundant number, since it is smaller than the sum of its proper divisors (2500560503).

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

2391405604 is an frugal number, since it uses more digits than its factorization.

2391405604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1030 (or 508 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 34.

The cubic root of 2391405604 is about 1337.2658298396.

The spelling of 2391405604 in words is "two billion, three hundred ninety-one million, four hundred five thousand, six hundred four".