2790864138 has 32 divisors (see below), whose sum is σ = 5686686720. Its totient is φ = 912852720.

The previous prime is 2790864133. The next prime is 2790864149. The reversal of 2790864138 is 8314680972.

It is not an unprimeable number, because it can be changed into a prime (2790864133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195231 + ... + 209037.

It is an arithmetic number, because the mean of its divisors is an integer number (177708960).

Almost surely, 2^2790864138 is an apocalyptic number.

2790864138 is an abundant number, since it is smaller than the sum of its proper divisors (2895822582).

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

2790864138 is a wasteful number, since it uses less digits than its factorization.

2790864138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14442.

The product of its (nonzero) digits is 580608, while the sum is 48.

The square root of 2790864138 is about 52828.6299084124. The cubic root of 2790864138 is about 1407.9251440516.

The spelling of 2790864138 in words is "two billion, seven hundred ninety million, eight hundred sixty-four thousand, one hundred thirty-eight".