22409890 has 16 divisors (see below), whose sum is σ = 40395960. Its totient is φ = 8951040.

The previous prime is 22409887. The next prime is 22409941. The reversal of 22409890 is 9890422.

It can be written as a sum of positive squares in 4 ways, for example, as 17783089 + 4626801 = 4217^2 + 2151^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8980 + ... + 11200.

Almost surely, 2^22409890 is an apocalyptic number.

22409890 is a deficient number, since it is larger than the sum of its proper divisors (17986070).

22409890 is a wasteful number, since it uses less digits than its factorization.

22409890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 22409890 is about 4733.9085331257. The cubic root of 22409890 is about 281.9334299548.

The spelling of 22409890 in words is "twenty-two million, four hundred nine thousand, eight hundred ninety".