25223828 has 18 divisors (see below), whose sum is σ = 51348906. Its totient is φ = 10810128.

The previous prime is 25223827. The next prime is 25223839. The reversal of 25223828 is 82832252.

It can be written as a sum of positive squares in only one way, i.e., 25120144 + 103684 = 5012^2 + 322^2 .

It is a junction number, because it is equal to n+sod(n) for n = 25223794 and 25223803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25223827) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 64151 + ... + 64542.

It is an arithmetic number, because the mean of its divisors is an integer number (2852717).

Almost surely, 2^25223828 is an apocalyptic number.

25223828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

25223828 is an abundant number, since it is smaller than the sum of its proper divisors (26125078).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25223828 is a wasteful number, since it uses less digits than its factorization.

25223828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128711 (or 128702 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 25223828 is about 5022.3329240503. The cubic root of 25223828 is about 293.2718184826.

The spelling of 25223828 in words is "twenty-five million, two hundred twenty-three thousand, eight hundred twenty-eight".