22917090 has 64 divisors (see below), whose sum is σ = 63924480. Its totient is φ = 5149440.

The previous prime is 22917079. The next prime is 22917101. The reversal of 22917090 is 9071922.

It is an interprime number because it is at equal distance from previous prime (22917079) and next prime (22917101).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 11916 + ... + 13704.

It is an arithmetic number, because the mean of its divisors is an integer number (998820).

Almost surely, 2^22917090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22917090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31962240).

22917090 is an abundant number, since it is smaller than the sum of its proper divisors (41007390).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22917090 is a wasteful number, since it uses less digits than its factorization.

22917090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1867.

The product of its (nonzero) digits is 2268, while the sum is 30.

The square root of 22917090 is about 4787.1797543021. The cubic root of 22917090 is about 284.0445691475.

The spelling of 22917090 in words is "twenty-two million, nine hundred seventeen thousand, ninety".