138965022 has 48 divisors (see below), whose sum is σ = 345800832. Its totient is φ = 39508560.

The previous prime is 138965009. The next prime is 138965053. The reversal of 138965022 is 220569831.

It is a super-2 number, since 2×138965022² = 38622554678920968, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23973 + ... + 29199.

It is an arithmetic number, because the mean of its divisors is an integer number (7204184).

Almost surely, 2^138965022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 138965022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172900416).

138965022 is an abundant number, since it is smaller than the sum of its proper divisors (206835810).

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

138965022 is a wasteful number, since it uses less digits than its factorization.

138965022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5453 (or 5450 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 138965022 is about 11788.3426316001. The cubic root of 138965022 is about 517.9666923521.

The spelling of 138965022 in words is "one hundred thirty-eight million, nine hundred sixty-five thousand, twenty-two".