138355204 has 24 divisors (see below), whose sum is σ = 262663128. Its totient is φ = 63386880.

The previous prime is 138355171. The next prime is 138355211. The reversal of 138355204 is 402553831.

It can be written as a sum of positive squares in 4 ways, for example, as 39312900 + 99042304 = 6270^2 + 9952^2 .

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, 2587 + ... + 16834.

It is an arithmetic number, because the mean of its divisors is an integer number (10944297).

Almost surely, 2^138355204 is an apocalyptic number.

It is an amenable number.

138355204 is a deficient number, since it is larger than the sum of its proper divisors (124307924).

138355204 is a wasteful number, since it uses less digits than its factorization.

138355204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19575 (or 19573 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 138355204 is about 11762.4488946818. The cubic root of 138355204 is about 517.2079196929.

The spelling of 138355204 in words is "one hundred thirty-eight million, three hundred fifty-five thousand, two hundred four".