22739391 has 6 divisors (see below), whose sum is σ = 32845800. Its totient is φ = 15159588.

The previous prime is 22739351. The next prime is 22739407. The reversal of 22739391 is 19393722.

It is not a de Polignac number, because 22739391 - 2⁷ = 22739263 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22739351) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1263291 + ... + 1263308.

It is an arithmetic number, because the mean of its divisors is an integer number (5474300).

Almost surely, 2^22739391 is an apocalyptic number.

22739391 is a deficient number, since it is larger than the sum of its proper divisors (10106409).

22739391 is a wasteful number, since it uses less digits than its factorization.

22739391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2526605 (or 2526602 counting only the distinct ones).

The product of its digits is 20412, while the sum is 36.

The square root of 22739391 is about 4768.5837520169. The cubic root of 22739391 is about 283.3085033220.

It can be divided in two parts, 2273 and 9391, that added together give a square (11664 = 108²).

The spelling of 22739391 in words is "twenty-two million, seven hundred thirty-nine thousand, three hundred ninety-one".