22951890 has 96 divisors (see below), whose sum is σ = 66407040. Its totient is φ = 5638464.

The previous prime is 22951801. The next prime is 22951891. The reversal of 22951890 is 9815922.

It is not an unprimeable number, because it can be changed into a prime (22951891) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 45379 + ... + 45881.

It is an arithmetic number, because the mean of its divisors is an integer number (691740).

Almost surely, 2^22951890 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22951890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33203520).

22951890 is an abundant number, since it is smaller than the sum of its proper divisors (43455150).

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

22951890 is a wasteful number, since it uses less digits than its factorization.

22951890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 526 counting only the distinct ones).

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

The square root of 22951890 is about 4790.8130833920. The cubic root of 22951890 is about 284.1882719742.

The spelling of 22951890 in words is "twenty-two million, nine hundred fifty-one thousand, eight hundred ninety".