22775490 has 72 divisors (see below), whose sum is σ = 62586108. Its totient is φ = 5745600.

The previous prime is 22775479. The next prime is 22775491. The reversal of 22775490 is 9457722.

It can be written as a sum of positive squares in 2 ways, for example, as 22382361 + 393129 = 4731^2 + 627^2 .

It is not an unprimeable number, because it can be changed into a prime (22775491) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 32140 + ... + 32840.

Almost surely, 2^22775490 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22775490, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31293054).

22775490 is an abundant number, since it is smaller than the sum of its proper divisors (39810618).

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

22775490 is a wasteful number, since it uses less digits than its factorization.

22775490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 730 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 22775490 is about 4772.3673370771. The cubic root of 22775490 is about 283.4583423763.

The spelling of 22775490 in words is "twenty-two million, seven hundred seventy-five thousand, four hundred ninety".