22139738 has 8 divisors (see below), whose sum is σ = 33250932. Its totient is φ = 11056096.

The previous prime is 22139737. The next prime is 22139749. The reversal of 22139738 is 83793122.

It can be written as a sum of positive squares in 2 ways, for example, as 20457529 + 1682209 = 4523^2 + 1297^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 22139698 and 22139707.

It is not an unprimeable number, because it can be changed into a prime (22139737) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4745 + ... + 8172.

Almost surely, 2^22139738 is an apocalyptic number.

22139738 is a deficient number, since it is larger than the sum of its proper divisors (11111194).

22139738 is a wasteful number, since it uses less digits than its factorization.

22139738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13776.

The product of its digits is 18144, while the sum is 35.

The square root of 22139738 is about 4705.2883014753. The cubic root of 22139738 is about 280.7959410592.

The spelling of 22139738 in words is "twenty-two million, one hundred thirty-nine thousand, seven hundred thirty-eight".