22990464 has 96 divisors (see below), whose sum is σ = 75635040. Its totient is φ = 6566400.

The previous prime is 22990459. The next prime is 22990469. The reversal of 22990464 is 46409922.

It is an interprime number because it is at equal distance from previous prime (22990459) and next prime (22990469).

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×22990464² = 1057122869870592, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (22990469) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6639 + ... + 9489.

It is an arithmetic number, because the mean of its divisors is an integer number (787865).

Almost surely, 2^22990464 is an apocalyptic number.

22990464 is a gapful number since it is divisible by the number (24) 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 22990464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37817520).

22990464 is an abundant number, since it is smaller than the sum of its proper divisors (52644576).

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

22990464 is a wasteful number, since it uses less digits than its factorization.

22990464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2878 (or 2863 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 22990464 is about 4794.8372235145. The cubic root of 22990464 is about 284.3473894861.

The spelling of 22990464 in words is "twenty-two million, nine hundred ninety thousand, four hundred sixty-four".