22256290 has 48 divisors (see below), whose sum is σ = 47536632. Its totient is φ = 7478016.

The previous prime is 22256287. The next prime is 22256293. The reversal of 22256290 is 9265222.

It is an interprime number because it is at equal distance from previous prime (22256287) and next prime (22256293).

It can be written as a sum of positive squares in 4 ways, for example, as 22061809 + 194481 = 4697^2 + 441^2 .

It is not an unprimeable number, because it can be changed into a prime (22256293) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25542 + ... + 26398.

Almost surely, 2^22256290 is an apocalyptic number.

22256290 is an abundant number, since it is smaller than the sum of its proper divisors (25280342).

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

22256290 is a wasteful number, since it uses less digits than its factorization.

22256290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931 (or 924 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 22256290 is about 4717.6572575803. The cubic root of 22256290 is about 281.2878177953.

It can be divided in two parts, 2225 and 6290, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 22256290 in words is "twenty-two million, two hundred fifty-six thousand, two hundred ninety".