2764440864 has 36 divisors (see below), whose sum is σ = 7861379526. Its totient is φ = 921480192.

The previous prime is 2764440859. The next prime is 2764440893. The reversal of 2764440864 is 4680444672.

It can be written as a sum of positive squares in only one way, i.e., 2144430864 + 620010000 = 46308^2 + 24900^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4799089 + ... + 4799664.

Almost surely, 2^2764440864 is an apocalyptic number.

2764440864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2764440864 is an abundant number, since it is smaller than the sum of its proper divisors (5096938662).

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

2764440864 is a wasteful number, since it uses less digits than its factorization.

2764440864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9598769 (or 9598758 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 45.

The square root of 2764440864 is about 52577.9503594425. The cubic root of 2764440864 is about 1403.4677408754.

The spelling of 2764440864 in words is "two billion, seven hundred sixty-four million, four hundred forty thousand, eight hundred sixty-four".