138774902 has 16 divisors (see below), whose sum is σ = 238056192. Its totient is φ = 59435880.

The previous prime is 138774871. The next prime is 138774943. The reversal of 138774902 is 209477831.

It is a self number, because there is not a number n which added to its sum of digits gives 138774902.

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, 31877 + ... + 35967.

It is an arithmetic number, because the mean of its divisors is an integer number (14878512).

Almost surely, 2^138774902 is an apocalyptic number.

138774902 is a deficient number, since it is larger than the sum of its proper divisors (99281290).

138774902 is a wasteful number, since it uses less digits than its factorization.

138774902 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6523.

The product of its (nonzero) digits is 84672, while the sum is 41.

The square root of 138774902 is about 11780.2759729983. The cubic root of 138774902 is about 517.7303720440.

The spelling of 138774902 in words is "one hundred thirty-eight million, seven hundred seventy-four thousand, nine hundred two".