138545512 has 32 divisors (see below), whose sum is σ = 314349120. Its totient is φ = 55883520.

The previous prime is 138545489. The next prime is 138545531. The reversal of 138545512 is 215545831.

138545512 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71814 + ... + 73717.

It is an arithmetic number, because the mean of its divisors is an integer number (9823410).

Almost surely, 2^138545512 is an apocalyptic number.

It is an amenable number.

138545512 is an abundant number, since it is smaller than the sum of its proper divisors (175803608).

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

138545512 is a wasteful number, since it uses less digits than its factorization.

138545512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145561 (or 145557 counting only the distinct ones).

The product of its digits is 24000, while the sum is 34.

The square root of 138545512 is about 11770.5357567105. The cubic root of 138545512 is about 517.4449513975. Note that the first 3 decimals are identical.

The spelling of 138545512 in words is "one hundred thirty-eight million, five hundred forty-five thousand, five hundred twelve".