22555890 has 48 divisors (see below), whose sum is σ = 67025088. Its totient is φ = 5155488.

The previous prime is 22555861. The next prime is 22555891. The reversal of 22555890 is 9855522.

22555890 = T₃₉₁ + T₃₉₂ + ... + T₅₇₉.

22555890 is a `hidden beast` number, since 22 + 55 + 589 + 0 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (22555891) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17272 + ... + 18531.

It is an arithmetic number, because the mean of its divisors is an integer number (1396356).

Almost surely, 2^22555890 is an apocalyptic number.

22555890 is an abundant number, since it is smaller than the sum of its proper divisors (44469198).

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

22555890 is a wasteful number, since it uses less digits than its factorization.

22555890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35823 (or 35820 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 22555890 is about 4749.3041595585. The cubic root of 22555890 is about 282.5443687328.

The spelling of 22555890 in words is "twenty-two million, five hundred fifty-five thousand, eight hundred ninety".