22722387 has 8 divisors (see below), whose sum is σ = 32078736. Its totient is φ = 14257152.

The previous prime is 22722311. The next prime is 22722391. The reversal of 22722387 is 78322722.

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

It is not a de Polignac number, because 22722387 - 2⁸ = 22722131 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22722307) 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, 222718 + ... + 222819.

It is an arithmetic number, because the mean of its divisors is an integer number (4009842).

Almost surely, 2^22722387 is an apocalyptic number.

22722387 is a deficient number, since it is larger than the sum of its proper divisors (9356349).

22722387 is a wasteful number, since it uses less digits than its factorization.

22722387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445557.

The product of its digits is 18816, while the sum is 33.

The square root of 22722387 is about 4766.8004992867. The cubic root of 22722387 is about 283.2378684918.

The spelling of 22722387 in words is "twenty-two million, seven hundred twenty-two thousand, three hundred eighty-seven".