22428415 has 4 divisors (see below), whose sum is σ = 26914104. Its totient is φ = 17942728.

The previous prime is 22428383. The next prime is 22428431. The reversal of 22428415 is 51482422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51482422 = 2 ⋅25741211.

It is a cyclic number.

It is not a de Polignac number, because 22428415 - 2⁵ = 22428383 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2242837 + ... + 2242846.

It is an arithmetic number, because the mean of its divisors is an integer number (6728526).

Almost surely, 2^22428415 is an apocalyptic number.

22428415 is a deficient number, since it is larger than the sum of its proper divisors (4485689).

22428415 is an equidigital number, since it uses as much as digits as its factorization.

22428415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4485688.

The product of its digits is 5120, while the sum is 28.

The square root of 22428415 is about 4735.8647573595. The cubic root of 22428415 is about 282.0110947465.

The spelling of 22428415 in words is "twenty-two million, four hundred twenty-eight thousand, four hundred fifteen".