25224728 has 16 divisors (see below), whose sum is σ = 47471280. Its totient is φ = 12565728.

The previous prime is 25224707. The next prime is 25224733. The reversal of 25224728 is 82742252.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 25224694 and 25224703.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3476 + ... + 7907.

It is an arithmetic number, because the mean of its divisors is an integer number (2966955).

Almost surely, 2^25224728 is an apocalyptic number.

It is an amenable number.

25224728 is a deficient number, since it is larger than the sum of its proper divisors (22246552).

25224728 is a wasteful number, since it uses less digits than its factorization.

25224728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11666 (or 11662 counting only the distinct ones).

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

The square root of 25224728 is about 5022.4225230460. The cubic root of 25224728 is about 293.2753064742.

It can be divided in two parts, 25224 and 728, that added together give a palindrome (25952).

The spelling of 25224728 in words is "twenty-five million, two hundred twenty-four thousand, seven hundred twenty-eight".