22391439 has 16 divisors (see below), whose sum is σ = 34218240. Its totient is φ = 12758400.

The previous prime is 22391429. The next prime is 22391471. The reversal of 22391439 is 93419322.

It is not a de Polignac number, because 22391439 - 2⁵ = 22391407 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22391429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7092 + ... + 9750.

It is an arithmetic number, because the mean of its divisors is an integer number (2138640).

Almost surely, 2^22391439 is an apocalyptic number.

22391439 is a deficient number, since it is larger than the sum of its proper divisors (11826801).

22391439 is a wasteful number, since it uses less digits than its factorization.

22391439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3070.

The product of its digits is 11664, while the sum is 33.

The square root of 22391439 is about 4731.9593193518. The cubic root of 22391439 is about 281.8560328468.

The spelling of 22391439 in words is "twenty-two million, three hundred ninety-one thousand, four hundred thirty-nine".