138540696 has 32 divisors (see below), whose sum is σ = 395831040. Its totient is φ = 39583008.

The previous prime is 138540683. The next prime is 138540713. The reversal of 138540696 is 696045831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

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, 412156 + ... + 412491.

It is an arithmetic number, because the mean of its divisors is an integer number (12369720).

Almost surely, 2^138540696 is an apocalyptic number.

It is an amenable number.

138540696 is an abundant number, since it is smaller than the sum of its proper divisors (257290344).

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

138540696 is a wasteful number, since it uses less digits than its factorization.

138540696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824663 (or 824659 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 138540696 is about 11770.3311763094. The cubic root of 138540696 is about 517.4389556691.

The spelling of 138540696 in words is "one hundred thirty-eight million, five hundred forty thousand, six hundred ninety-six".