22195890 has 32 divisors (see below), whose sum is σ = 59189760. Its totient is φ = 5918832.

The previous prime is 22195889. The next prime is 22195981. The reversal of 22195890 is 9859122.

It is a super-3 number, since 3×22195890³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 40834 + ... + 41373.

It is an arithmetic number, because the mean of its divisors is an integer number (1849680).

Almost surely, 2^22195890 is an apocalyptic number.

22195890 is an abundant number, since it is smaller than the sum of its proper divisors (36993870).

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

22195890 is a wasteful number, since it uses less digits than its factorization.

22195890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82223 (or 82217 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 22195890 is about 4711.2514261075. The cubic root of 22195890 is about 281.0331305947.

The spelling of 22195890 in words is "twenty-two million, one hundred ninety-five thousand, eight hundred ninety".