22610640 has 80 divisors (see below), whose sum is σ = 75495168. Its totient is φ = 5564928.

The previous prime is 22610597. The next prime is 22610641. The reversal of 22610640 is 4601622.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×22610640² = 1022482082419200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22610641) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 504 + ... + 6743.

Almost surely, 2^22610640 is an apocalyptic number.

22610640 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 22610640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37747584).

22610640 is an abundant number, since it is smaller than the sum of its proper divisors (52884528).

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

22610640 is a wasteful number, since it uses less digits than its factorization.

22610640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7276 (or 7270 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22610640 is about 4755.0646683300. The cubic root of 22610640 is about 282.7727910326.

The spelling of 22610640 in words is "twenty-two million, six hundred ten thousand, six hundred forty".