22899890 has 16 divisors (see below), whose sum is σ = 44390808. Its totient is φ = 8455296.

The previous prime is 22899889. The next prime is 22899893. The reversal of 22899890 is 9899822.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 7557001 + 15342889 = 2749^2 + 3917^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22899893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 87947 + ... + 88206.

Almost surely, 2^22899890 is an apocalyptic number.

22899890 is a deficient number, since it is larger than the sum of its proper divisors (21490918).

22899890 is a wasteful number, since it uses less digits than its factorization.

22899890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176173.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 22899890 is about 4785.3829522829. The cubic root of 22899890 is about 283.9734898881.

The spelling of 22899890 in words is "twenty-two million, eight hundred ninety-nine thousand, eight hundred ninety".