22556690 has 32 divisors (see below), whose sum is σ = 44029440. Its totient is φ = 8270784.

The previous prime is 22556687. The next prime is 22556701. The reversal of 22556690 is 9665522.

It is a super-2 number, since 2×22556690² = 1017608527512200, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22556690.

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, 21191 + ... + 22229.

It is an arithmetic number, because the mean of its divisors is an integer number (1375920).

Almost surely, 2^22556690 is an apocalyptic number.

22556690 is a deficient number, since it is larger than the sum of its proper divisors (21472750).

22556690 is a wasteful number, since it uses less digits than its factorization.

22556690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1226.

The product of its (nonzero) digits is 32400, while the sum is 35.

The square root of 22556690 is about 4749.3883816761. The cubic root of 22556690 is about 282.5477090698.

The spelling of 22556690 in words is "twenty-two million, five hundred fifty-six thousand, six hundred ninety".