22725428 has 24 divisors (see below), whose sum is σ = 44101344. Its totient is φ = 10159200.

The previous prime is 22725421. The next prime is 22725431. The reversal of 22725428 is 82452722.

It is a junction number, because it is equal to n+sod(n) for n = 22725394 and 22725403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22725421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1550 + ... + 6917.

It is an arithmetic number, because the mean of its divisors is an integer number (1837556).

Almost surely, 2^22725428 is an apocalyptic number.

It is an amenable number.

22725428 is a deficient number, since it is larger than the sum of its proper divisors (21375916).

22725428 is a wasteful number, since it uses less digits than its factorization.

22725428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8543 (or 8541 counting only the distinct ones).

The product of its digits is 17920, while the sum is 32.

The square root of 22725428 is about 4767.1194656732. The cubic root of 22725428 is about 283.2505034310.

The spelling of 22725428 in words is "twenty-two million, seven hundred twenty-five thousand, four hundred twenty-eight".