22428425 has 6 divisors (see below), whose sum is σ = 27811278. Its totient is φ = 17942720.

The previous prime is 22428383. The next prime is 22428431. The reversal of 22428425 is 52482422.

It can be written as a sum of positive squares in 3 ways, for example, as 3182656 + 19245769 = 1784^2 + 4387^2 .

It is a de Polignac number, because none of the positive numbers 2^k-22428425 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 448544 + ... + 448593.

It is an arithmetic number, because the mean of its divisors is an integer number (4635213).

Almost surely, 2^22428425 is an apocalyptic number.

22428425 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22428425 is a deficient number, since it is larger than the sum of its proper divisors (5382853).

22428425 is an equidigital number, since it uses as much as digits as its factorization.

22428425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 897147 (or 897142 counting only the distinct ones).

The product of its digits is 10240, while the sum is 29.

The square root of 22428425 is about 4735.8658131328. The cubic root of 22428425 is about 282.0111366593.

The spelling of 22428425 in words is "twenty-two million, four hundred twenty-eight thousand, four hundred twenty-five".