2268991764 has 60 divisors (see below), whose sum is σ = 6387880884. Its totient is φ = 698150016.

The previous prime is 2268991727. The next prime is 2268991771. The reversal of 2268991764 is 4671998622.

It can be written as a sum of positive squares in 2 ways, for example, as 129004164 + 2139987600 = 11358^2 + 46260^2 .

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 2268991764.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 265137 + ... + 273560.

Almost surely, 2^2268991764 is an apocalyptic number.

It is an amenable number.

2268991764 is an abundant number, since it is smaller than the sum of its proper divisors (4118889120).

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

2268991764 is a wasteful number, since it uses less digits than its factorization.

2268991764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 538726 (or 538715 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 2268991764 is about 47633.9350043643. The cubic root of 2268991764 is about 1314.0472241738.

The spelling of 2268991764 in words is "two billion, two hundred sixty-eight million, nine hundred ninety-one thousand, seven hundred sixty-four".