138900254 has 8 divisors (see below), whose sum is σ = 208416240. Its totient is φ = 69428176.

The previous prime is 138900247. The next prime is 138900259. The reversal of 138900254 is 452009831.

138900254 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×138900254² = 38586561122529032, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 138900254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138900259) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1394 + ... + 16725.

It is an arithmetic number, because the mean of its divisors is an integer number (26052030).

Almost surely, 2^138900254 is an apocalyptic number.

138900254 is a deficient number, since it is larger than the sum of its proper divisors (69515986).

138900254 is a wasteful number, since it uses less digits than its factorization.

138900254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21954.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 138900254 is about 11785.5951907403. The cubic root of 138900254 is about 517.8862095574.

The spelling of 138900254 in words is "one hundred thirty-eight million, nine hundred thousand, two hundred fifty-four".