22649809 has 36 divisors (see below), whose sum is σ = 30111732. Its totient is φ = 16873920.

The previous prime is 22649807. The next prime is 22649821. The reversal of 22649809 is 90894622.

It can be written as a sum of positive squares in 2 ways, for example, as 12054784 + 10595025 = 3472^2 + 3255^2 .

It is not a de Polignac number, because 22649809 - 2¹ = 22649807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22649801) 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, 612139 + ... + 612175.

It is an arithmetic number, because the mean of its divisors is an integer number (836437).

Almost surely, 2^22649809 is an apocalyptic number.

It is an amenable number.

22649809 is a deficient number, since it is larger than the sum of its proper divisors (7461923).

22649809 is a wasteful number, since it uses less digits than its factorization.

22649809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 40.

The square root of 22649809 is about 4759.1815472831. The cubic root of 22649809 is about 282.9359817235.

The spelling of 22649809 in words is "twenty-two million, six hundred forty-nine thousand, eight hundred nine".