22961890 has 24 divisors (see below), whose sum is σ = 48080412. Its totient is φ = 7872480.

The previous prime is 22961833. The next prime is 22961891. The reversal of 22961890 is 9816922.

It can be written as a sum of positive squares in 2 ways, for example, as 22591009 + 370881 = 4753^2 + 609^2 .

It is not an unprimeable number, because it can be changed into a prime (22961891) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22941 + ... + 23920.

Almost surely, 2^22961890 is an apocalyptic number.

22961890 is an abundant number, since it is smaller than the sum of its proper divisors (25118522).

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

22961890 is a wasteful number, since it uses less digits than its factorization.

22961890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46882 (or 46875 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 37.

The square root of 22961890 is about 4791.8566339155. The cubic root of 22961890 is about 284.2295390200.

It can be divided in two parts, 2296 and 1890, that added together give a triangular number (4186 = T₉₁).

The spelling of 22961890 in words is "twenty-two million, nine hundred sixty-one thousand, eight hundred ninety".