138786488 has 32 divisors (see below), whose sum is σ = 279763200. Its totient is φ = 64338912.

The previous prime is 138786463. The next prime is 138786491. The reversal of 138786488 is 884687831.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2570 + ... + 16857.

It is an arithmetic number, because the mean of its divisors is an integer number (8742600).

Almost surely, 2^138786488 is an apocalyptic number.

It is an amenable number.

138786488 is an abundant number, since it is smaller than the sum of its proper divisors (140976712).

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

138786488 is a wasteful number, since it uses less digits than its factorization.

138786488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19499 (or 19495 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 53.

The square root of 138786488 is about 11780.7677169190. The cubic root of 138786488 is about 517.7447796856.

The spelling of 138786488 in words is "one hundred thirty-eight million, seven hundred eighty-six thousand, four hundred eighty-eight".