22405939 has 8 divisors (see below), whose sum is σ = 22915728. Its totient is φ = 21901440.

The previous prime is 22405937. The next prime is 22405961. The reversal of 22405939 is 93950422.

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

It is a cyclic number.

It is not a de Polignac number, because 22405939 - 2¹ = 22405937 is a prime.

It is a super-2 number, since 2×22405939² = 1004052204943442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22405937) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7959 + ... + 10399.

It is an arithmetic number, because the mean of its divisors is an integer number (2864466).

Almost surely, 2^22405939 is an apocalyptic number.

22405939 is a deficient number, since it is larger than the sum of its proper divisors (509789).

22405939 is a wasteful number, since it uses less digits than its factorization.

22405939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2645.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 22405939 is about 4733.4912062874. The cubic root of 22405939 is about 281.9168601211.

The spelling of 22405939 in words is "twenty-two million, four hundred five thousand, nine hundred thirty-nine".