25628 has 12 divisors (see below), whose sum is σ = 46200. Its totient is φ = 12432.

The previous prime is 25621. The next prime is 25633. The reversal of 25628 is 82652.

It is a happy number.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 98 + ... + 246.

It is an arithmetic number, because the mean of its divisors is an integer number (3850).

2²⁵⁶²⁸ is an apocalyptic number.

It is an amenable number.

25628 is a deficient number, since it is larger than the sum of its proper divisors (20572).

25628 is a wasteful number, since it uses less digits than its factorization.

25628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196 (or 194 counting only the distinct ones).

The product of its digits is 960, while the sum is 23.

The square root of 25628 is about 160.0874760873. The cubic root of 25628 is about 29.4829931659.

Adding to 25628 its sum of digits (23), we get a triangular number (25651 = T₂₂₆).

The spelling of 25628 in words is "twenty-five thousand, six hundred twenty-eight".