25529928 has 16 divisors (see below), whose sum is σ = 63824880. Its totient is φ = 8509968.

The previous prime is 25529923. The next prime is 25529929. The reversal of 25529928 is 82992552.

It is a self number, because there is not a number n which added to its sum of digits gives 25529928.

It is not an unprimeable number, because it can be changed into a prime (25529923) 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, 531850 + ... + 531897.

It is an arithmetic number, because the mean of its divisors is an integer number (3989055).

Almost surely, 2^25529928 is an apocalyptic number.

It is an amenable number.

25529928 is an abundant number, since it is smaller than the sum of its proper divisors (38294952).

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

25529928 is a wasteful number, since it uses less digits than its factorization.

25529928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1063756 (or 1063752 counting only the distinct ones).

The product of its digits is 129600, while the sum is 42.

The square root of 25529928 is about 5052.7149137864. The cubic root of 25529928 is about 294.4533705718.

The spelling of 25529928 in words is "twenty-five million, five hundred twenty-nine thousand, nine hundred twenty-eight".