138923088 has 80 divisors (see below), whose sum is σ = 373059456. Its totient is φ = 44513280.

The previous prime is 138923053. The next prime is 138923089. The reversal of 138923088 is 880329831.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138923089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 143181 + ... + 144147.

Almost surely, 2^138923088 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138923088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186529728).

138923088 is an abundant number, since it is smaller than the sum of its proper divisors (234136368).

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

138923088 is a wasteful number, since it uses less digits than its factorization.

138923088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1092 (or 1086 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 138923088 is about 11786.5638758715. The cubic root of 138923088 is about 517.9145866732.

The spelling of 138923088 in words is "one hundred thirty-eight million, nine hundred twenty-three thousand, eighty-eight".