22890947 has 4 divisors (see below), whose sum is σ = 23680320. Its totient is φ = 22101576.

The previous prime is 22890913. The next prime is 22890971. The reversal of 22890947 is 74909822.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22890947 - 2⁶ = 22890883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22890977) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 394643 + ... + 394700.

It is an arithmetic number, because the mean of its divisors is an integer number (5920080).

Almost surely, 2^22890947 is an apocalyptic number.

22890947 is a deficient number, since it is larger than the sum of its proper divisors (789373).

22890947 is an equidigital number, since it uses as much as digits as its factorization.

22890947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789372.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 22890947 is about 4784.4484530612. The cubic root of 22890947 is about 283.9365187413.

The spelling of 22890947 in words is "twenty-two million, eight hundred ninety thousand, nine hundred forty-seven".