138926958 has 32 divisors (see below), whose sum is σ = 295936416. Its totient is φ = 43327488.

The previous prime is 138926947. The next prime is 138926959. The reversal of 138926958 is 859629831.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a self number, because there is not a number n which added to its sum of digits gives 138926958.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138926959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13710 + ... + 21582.

It is an arithmetic number, because the mean of its divisors is an integer number (9248013).

Almost surely, 2^138926958 is an apocalyptic number.

138926958 is an abundant number, since it is smaller than the sum of its proper divisors (157009458).

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

138926958 is a wasteful number, since it uses less digits than its factorization.

138926958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8068.

The product of its digits is 933120, while the sum is 51.

The square root of 138926958 is about 11786.7280447120. The cubic root of 138926958 is about 517.9193958351.

The spelling of 138926958 in words is "one hundred thirty-eight million, nine hundred twenty-six thousand, nine hundred fifty-eight".