22628447 has 4 divisors (see below), whose sum is σ = 23012040. Its totient is φ = 22244856.

The previous prime is 22628429. The next prime is 22628453. The reversal of 22628447 is 74482622.

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 22628447 - 2⁶ = 22628383 is a prime.

It is a super-2 number, since 2×22628447² = 1024093227263618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22628477) 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 3 ways as a sum of consecutive naturals, for example, 191708 + ... + 191825.

It is an arithmetic number, because the mean of its divisors is an integer number (5753010).

Almost surely, 2^22628447 is an apocalyptic number.

22628447 is a deficient number, since it is larger than the sum of its proper divisors (383593).

22628447 is an equidigital number, since it uses as much as digits as its factorization.

22628447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383592.

The product of its digits is 43008, while the sum is 35.

The square root of 22628447 is about 4756.9367244057. The cubic root of 22628447 is about 282.8470040846.

The spelling of 22628447 in words is "twenty-two million, six hundred twenty-eight thousand, four hundred forty-seven".