22490532 has 18 divisors (see below), whose sum is σ = 56851158. Its totient is φ = 7496832.

The previous prime is 22490521. The next prime is 22490537. The reversal of 22490532 is 23509422.

It can be written as a sum of positive squares in only one way, i.e., 14333796 + 8156736 = 3786^2 + 2856^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a junction number, because it is equal to n+sod(n) for n = 22490496 and 22490505.

It is not an unprimeable number, because it can be changed into a prime (22490537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 312333 + ... + 312404.

Almost surely, 2^22490532 is an apocalyptic number.

It is an amenable number.

22490532 is an abundant number, since it is smaller than the sum of its proper divisors (34360626).

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

22490532 is a wasteful number, since it uses less digits than its factorization.

22490532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 624747 (or 624742 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 22490532 is about 4742.4183704098. The cubic root of 22490532 is about 282.2712043125.

Adding to 22490532 its reverse (23509422), we get a palindrome (45999954).

The spelling of 22490532 in words is "twenty-two million, four hundred ninety thousand, five hundred thirty-two".