138534732 has 48 divisors (see below), whose sum is σ = 410475520. Its totient is φ = 39581136.

The previous prime is 138534713. The next prime is 138534743. The reversal of 138534732 is 237435831.

138534732 is a `hidden beast` number, since 138 + 53 + 473 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 15 ways as a sum of consecutive naturals, for example, 90868 + ... + 92379.

Almost surely, 2^138534732 is an apocalyptic number.

138534732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

138534732 is an abundant number, since it is smaller than the sum of its proper divisors (271940788).

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

138534732 is a wasteful number, since it uses less digits than its factorization.

138534732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183267 (or 183259 counting only the distinct ones).

The product of its digits is 60480, while the sum is 36.

The square root of 138534732 is about 11770.0778247215. The cubic root of 138534732 is about 517.4315305339.

The spelling of 138534732 in words is "one hundred thirty-eight million, five hundred thirty-four thousand, seven hundred thirty-two".