22139508 has 48 divisors (see below), whose sum is σ = 56052864. Its totient is φ = 6773760.

The previous prime is 22139483. The next prime is 22139521. The reversal of 22139508 is 80593122.

22139508 = T₂₁₇ + T₂₁₈ + ... + T₅₂₂.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7041 + ... + 9687.

It is an arithmetic number, because the mean of its divisors is an integer number (1167768).

Almost surely, 2^22139508 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 22139508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28026432).

22139508 is an abundant number, since it is smaller than the sum of its proper divisors (33913356).

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

22139508 is a wasteful number, since it uses less digits than its factorization.

22139508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2712 (or 2710 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 22139508 is about 4705.2638608265. The cubic root of 22139508 is about 280.7949687007.

The spelling of 22139508 in words is "twenty-two million, one hundred thirty-nine thousand, five hundred eight".