22790665 has 8 divisors (see below), whose sum is σ = 28292040. Its totient is φ = 17603712.

The previous prime is 22790641. The next prime is 22790681. The reversal of 22790665 is 56609722.

It can be written as a sum of positive squares in 4 ways, for example, as 8982009 + 13808656 = 2997^2 + 3716^2 .

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 22790665 - 2¹¹ = 22788617 is a prime.

It is a super-2 number, since 2×22790665² = 1038828822284450, which contains 22 as substring.

It is an unprimeable number.

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, 78444 + ... + 78733.

It is an arithmetic number, because the mean of its divisors is an integer number (3536505).

Almost surely, 2^22790665 is an apocalyptic number.

It is an amenable number.

22790665 is a deficient number, since it is larger than the sum of its proper divisors (5501375).

22790665 is a wasteful number, since it uses less digits than its factorization.

22790665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157211.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 22790665 is about 4773.9569541419. The cubic root of 22790665 is about 283.5212832154.

The spelling of 22790665 in words is "twenty-two million, seven hundred ninety thousand, six hundred sixty-five".