2391761994 has 32 divisors (see below), whose sum is σ = 5074742016. Its totient is φ = 748899840.

The previous prime is 2391761989. The next prime is 2391762007. The reversal of 2391761994 is 4991671932.

It is a Harshad number since it is a multiple of its sum of digits (51).

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, 30639 + ... + 75645.

It is an arithmetic number, because the mean of its divisors is an integer number (158585688).

Almost surely, 2^2391761994 is an apocalyptic number.

2391761994 is an abundant number, since it is smaller than the sum of its proper divisors (2682980022).

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

2391761994 is a wasteful number, since it uses less digits than its factorization.

2391761994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45550.

The product of its digits is 734832, while the sum is 51.

The square root of 2391761994 is about 48905.6437847412. The cubic root of 2391761994 is about 1337.3322572293.

The spelling of 2391761994 in words is "two billion, three hundred ninety-one million, seven hundred sixty-one thousand, nine hundred ninety-four".