22750290 has 48 divisors (see below), whose sum is σ = 59700888. Its totient is φ = 6010368.

The previous prime is 22750279. The next prime is 22750307. The reversal of 22750290 is 9205722.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 14814801 + 7935489 = 3849^2 + 2817^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9052 + ... + 11288.

Almost surely, 2^22750290 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22750290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29850444).

22750290 is an abundant number, since it is smaller than the sum of its proper divisors (36950598).

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

22750290 is a wasteful number, since it uses less digits than its factorization.

22750290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2363 (or 2360 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 22750290 is about 4769.7264072481. The cubic root of 22750290 is about 283.3537593886.

The spelling of 22750290 in words is "twenty-two million, seven hundred fifty thousand, two hundred ninety".