22405859 has 4 divisors (see below), whose sum is σ = 25606704. Its totient is φ = 19205016.

The previous prime is 22405837. The next prime is 22405861. The reversal of 22405859 is 95850422.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 22405859 - 2¹² = 22401763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22405829) 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, 1600412 + ... + 1600425.

It is an arithmetic number, because the mean of its divisors is an integer number (6401676).

Almost surely, 2^22405859 is an apocalyptic number.

22405859 is a deficient number, since it is larger than the sum of its proper divisors (3200845).

22405859 is an equidigital number, since it uses as much as digits as its factorization.

22405859 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3200844.

The product of its (nonzero) digits is 28800, while the sum is 35.

The square root of 22405859 is about 4733.4827558575. The cubic root of 22405859 is about 281.9165245944.

The spelling of 22405859 in words is "twenty-two million, four hundred five thousand, eight hundred fifty-nine".