2138687404 has 12 divisors (see below), whose sum is σ = 4277374864. Its totient is φ = 916580304.

The previous prime is 2138687399. The next prime is 2138687413. The reversal of 2138687404 is 4047868312.

2138687404 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38190819 + ... + 38190874.

Almost surely, 2^2138687404 is an apocalyptic number.

It is an amenable number.

2138687404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2138687404 is a wasteful number, since it uses less digits than its factorization.

2138687404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76381704 (or 76381702 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 43.

The square root of 2138687404 is about 46245.9447303220. The cubic root of 2138687404 is about 1288.3952169563.

The spelling of 2138687404 in words is "two billion, one hundred thirty-eight million, six hundred eighty-seven thousand, four hundred four".