22792721 has 8 divisors (see below), whose sum is σ = 26185344. Its totient is φ = 19434240.

The previous prime is 22792691. The next prime is 22792727. The reversal of 22792721 is 12729722.

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

It is a de Polignac number, because none of the positive numbers 2^k-22792721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22792727) 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, 7085 + ... + 9786.

It is an arithmetic number, because the mean of its divisors is an integer number (3273168).

Almost surely, 2^22792721 is an apocalyptic number.

It is an amenable number.

22792721 is a deficient number, since it is larger than the sum of its proper divisors (3392623).

22792721 is a wasteful number, since it uses less digits than its factorization.

22792721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17071.

The product of its digits is 7056, while the sum is 32.

The square root of 22792721 is about 4774.1722842813. The cubic root of 22792721 is about 283.5298086684.

The spelling of 22792721 in words is "twenty-two million, seven hundred ninety-two thousand, seven hundred twenty-one".