138684552 has 32 divisors (see below), whose sum is σ = 349250400. Its totient is φ = 45889664.

The previous prime is 138684551. The next prime is 138684563. The reversal of 138684552 is 255486831.

It is not an unprimeable number, because it can be changed into a prime (138684551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17802 + ... + 24377.

It is an arithmetic number, because the mean of its divisors is an integer number (10914075).

Almost surely, 2^138684552 is an apocalyptic number.

138684552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138684552 is an abundant number, since it is smaller than the sum of its proper divisors (210565848).

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

138684552 is a wasteful number, since it uses less digits than its factorization.

138684552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42325 (or 42321 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 138684552 is about 11776.4405488246. The cubic root of 138684552 is about 517.6179907859.

The spelling of 138684552 in words is "one hundred thirty-eight million, six hundred eighty-four thousand, five hundred fifty-two".