22650290 has 64 divisors (see below), whose sum is σ = 47918304. Its totient is φ = 7630848.

The previous prime is 22650283. The next prime is 22650301. The reversal of 22650290 is 9205622.

It can be written as a sum of positive squares in 16 ways, for example, as 2283121 + 20367169 = 1511^2 + 4513^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 81632 + ... + 81908.

Almost surely, 2^22650290 is an apocalyptic number.

22650290 is an abundant number, since it is smaller than the sum of its proper divisors (25268014).

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

22650290 is a wasteful number, since it uses less digits than its factorization.

22650290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 22650290 is about 4759.2320809139. The cubic root of 22650290 is about 282.9379845549.

It can be divided in two parts, 22650 and 290, that multiplied together give a triangular number (6568500 = T₃₆₂₄).

The spelling of 22650290 in words is "twenty-two million, six hundred fifty thousand, two hundred ninety".