2809731168 has 72 divisors (see below), whose sum is σ = 8460197928. Its totient is φ = 881482752.

The previous prime is 2809731139. The next prime is 2809731181. The reversal of 2809731168 is 8611379082.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 282046 + ... + 291837.

It is an arithmetic number, because the mean of its divisors is an integer number (117502749).

Almost surely, 2^2809731168 is an apocalyptic number.

It is an amenable number.

2809731168 is an abundant number, since it is smaller than the sum of its proper divisors (5650466760).

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

2809731168 is a wasteful number, since it uses less digits than its factorization.

2809731168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 573916 (or 573905 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The square root of 2809731168 is about 53006.8973625131. The cubic root of 2809731168 is about 1411.0906786680.

The spelling of 2809731168 in words is "two billion, eight hundred nine million, seven hundred thirty-one thousand, one hundred sixty-eight".