138788916 has 48 divisors (see below), whose sum is σ = 370683264. Its totient is φ = 39591936.

The previous prime is 138788873. The next prime is 138788917. The reversal of 138788916 is 619887831.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138788917) 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, 96136 + ... + 97568.

It is an arithmetic number, because the mean of its divisors is an integer number (7722568).

Almost surely, 2^138788916 is an apocalyptic number.

It is an amenable number.

138788916 is an abundant number, since it is smaller than the sum of its proper divisors (231894348).

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

138788916 is a wasteful number, since it uses less digits than its factorization.

138788916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2600 (or 2598 counting only the distinct ones).

The product of its digits is 580608, while the sum is 51.

The square root of 138788916 is about 11780.8707657796. The cubic root of 138788916 is about 517.7477988964.

The spelling of 138788916 in words is "one hundred thirty-eight million, seven hundred eighty-eight thousand, nine hundred sixteen".