2815640788 has 6 divisors (see below), whose sum is σ = 4927371386. Its totient is φ = 1407820392.

The previous prime is 2815640783. The next prime is 2815640801. The reversal of 2815640788 is 8870465182.

2815640788 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 2745550404 + 70090384 = 52398^2 + 8372^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2815640783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 351955095 + ... + 351955102.

Almost surely, 2^2815640788 is an apocalyptic number.

It is an amenable number.

2815640788 is a deficient number, since it is larger than the sum of its proper divisors (2111730598).

2815640788 is a wasteful number, since it uses less digits than its factorization.

2815640788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703910201 (or 703910199 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 49.

The square root of 2815640788 is about 53062.6119598348. The cubic root of 2815640788 is about 1412.0792869045.

The spelling of 2815640788 in words is "two billion, eight hundred fifteen million, six hundred forty thousand, seven hundred eighty-eight".