2391389474 has 16 divisors (see below), whose sum is σ = 3712747320. Its totient is φ = 1153850880.

The previous prime is 2391389461. The next prime is 2391389491. The reversal of 2391389474 is 4749831932.

It can be written as a sum of positive squares in 4 ways, for example, as 1138725025 + 1252664449 = 33745^2 + 35393^2 .

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, 110792 + ... + 130604.

Almost surely, 2^2391389474 is an apocalyptic number.

2391389474 is a deficient number, since it is larger than the sum of its proper divisors (1321357846).

2391389474 is a wasteful number, since it uses less digits than its factorization.

2391389474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21925.

The product of its digits is 1306368, while the sum is 50.

The square root of 2391389474 is about 48901.8350780418. The cubic root of 2391389474 is about 1337.2628232193.

The spelling of 2391389474 in words is "two billion, three hundred ninety-one million, three hundred eighty-nine thousand, four hundred seventy-four".