22040409 has 4 divisors (see below), whose sum is σ = 29387216. Its totient is φ = 14693604.

The previous prime is 22040393. The next prime is 22040429. The reversal of 22040409 is 90404022.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 22040409 - 2⁴ = 22040393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22040429) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3673399 + ... + 3673404.

It is an arithmetic number, because the mean of its divisors is an integer number (7346804).

Almost surely, 2^22040409 is an apocalyptic number.

It is an amenable number.

22040409 is a deficient number, since it is larger than the sum of its proper divisors (7346807).

22040409 is an equidigital number, since it uses as much as digits as its factorization.

22040409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7346806.

The product of its (nonzero) digits is 576, while the sum is 21.

The square root of 22040409 is about 4694.7213974846. The cubic root of 22040409 is about 280.3753851163.

The spelling of 22040409 in words is "twenty-two million, forty thousand, four hundred nine".