22536390 has 32 divisors (see below), whose sum is σ = 57270240. Its totient is φ = 5656064.

The previous prime is 22536361. The next prime is 22536391. The reversal of 22536390 is 9363522.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22536391) 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 15 ways as a sum of consecutive naturals, for example, 21585 + ... + 22604.

It is an arithmetic number, because the mean of its divisors is an integer number (1789695).

Almost surely, 2^22536390 is an apocalyptic number.

22536390 is an abundant number, since it is smaller than the sum of its proper divisors (34733850).

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

22536390 is a wasteful number, since it uses less digits than its factorization.

22536390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44216.

The product of its (nonzero) digits is 9720, while the sum is 30.

The square root of 22536390 is about 4747.2507833482. The cubic root of 22536390 is about 282.4629235807.

The spelling of 22536390 in words is "twenty-two million, five hundred thirty-six thousand, three hundred ninety".