22573890 has 120 divisors (see below), whose sum is σ = 64882620. Its totient is φ = 5624640.

The previous prime is 22573883. The next prime is 22573933. The reversal of 22573890 is 9837522.

It is a happy number.

22573890 is a `hidden beast` number, since 2 + 2 + 573 + 89 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22496049 + 77841 = 4743^2 + 279^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 728175 + ... + 728205.

Almost surely, 2^22573890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22573890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32441310).

22573890 is an abundant number, since it is smaller than the sum of its proper divisors (42308730).

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

22573890 is a wasteful number, since it uses less digits than its factorization.

22573890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 22573890 is about 4751.1987960935. The cubic root of 22573890 is about 282.6195072204.

The spelling of 22573890 in words is "twenty-two million, five hundred seventy-three thousand, eight hundred ninety".