22928640 has 144 divisors (see below), whose sum is σ = 83787648. Its totient is φ = 5234688.

The previous prime is 22928629. The next prime is 22928651. The reversal of 22928640 is 4682922.

It is an interprime number because it is at equal distance from previous prime (22928629) and next prime (22928651).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26454 + ... + 27306.

Almost surely, 2^22928640 is an apocalyptic number.

22928640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22928640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41893824).

22928640 is an abundant number, since it is smaller than the sum of its proper divisors (60859008).

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

22928640 is an equidigital number, since it uses as much as digits as its factorization.

22928640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 884 (or 870 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 22928640 is about 4788.3859493570. The cubic root of 22928640 is about 284.0922797393.

The spelling of 22928640 in words is "twenty-two million, nine hundred twenty-eight thousand, six hundred forty".