22645998 has 36 divisors (see below), whose sum is σ = 50483160. Its totient is φ = 7336656.

The previous prime is 22645979. The next prime is 22646021. The reversal of 22645998 is 89954622.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 24183 + ... + 25101.

It is an arithmetic number, because the mean of its divisors is an integer number (1402310).

Almost surely, 2^22645998 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22645998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25241580).

22645998 is an abundant number, since it is smaller than the sum of its proper divisors (27837162).

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

22645998 is a wasteful number, since it uses less digits than its factorization.

22645998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 961 counting only the distinct ones).

The product of its digits is 311040, while the sum is 45.

The square root of 22645998 is about 4758.7811464702. The cubic root of 22645998 is about 282.9201121341.

The spelling of 22645998 in words is "twenty-two million, six hundred forty-five thousand, nine hundred ninety-eight".