22790721 has 8 divisors (see below), whose sum is σ = 30754080. Its totient is φ = 15010592.

The previous prime is 22790687. The next prime is 22790737. The reversal of 22790721 is 12709722.

It is a happy number.

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 22790721 - 2¹¹ = 22788673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22790741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45516 + ... + 46013.

It is an arithmetic number, because the mean of its divisors is an integer number (3844260).

Almost surely, 2^22790721 is an apocalyptic number.

It is an amenable number.

22790721 is a deficient number, since it is larger than the sum of its proper divisors (7963359).

22790721 is an equidigital number, since it uses as much as digits as its factorization.

22790721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91615.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 22790721 is about 4773.9628192938. The cubic root of 22790721 is about 283.5215154330.

The spelling of 22790721 in words is "twenty-two million, seven hundred ninety thousand, seven hundred twenty-one".