138684200 has 24 divisors (see below), whose sum is σ = 322441230. Its totient is φ = 55473600.

The previous prime is 138684197. The next prime is 138684233. The reversal of 138684200 is 2486831.

It can be written as a sum of positive squares in 3 ways, for example, as 109286116 + 29398084 = 10454^2 + 5422^2 .

It is a hoax number, since the sum of its digits (32) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 346511 + ... + 346910.

Almost surely, 2^138684200 is an apocalyptic number.

138684200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

138684200 is an abundant number, since it is smaller than the sum of its proper divisors (183757030).

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

138684200 is a wasteful number, since it uses less digits than its factorization.

138684200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693437 (or 693428 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 138684200 is about 11776.4256037220. The cubic root of 138684200 is about 517.6175528576.

The spelling of 138684200 in words is "one hundred thirty-eight million, six hundred eighty-four thousand, two hundred".