25529428 has 12 divisors (see below), whose sum is σ = 44839732. Its totient is φ = 12718080.

The previous prime is 25529381. The next prime is 25529431. The reversal of 25529428 is 82492552.

It can be written as a sum of positive squares in 2 ways, for example, as 4717584 + 20811844 = 2172^2 + 4562^2 .

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, 10413 + ... + 12628.

Almost surely, 2^25529428 is an apocalyptic number.

It is an amenable number.

25529428 is a deficient number, since it is larger than the sum of its proper divisors (19310304).

25529428 is a wasteful number, since it uses less digits than its factorization.

25529428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23322 (or 23320 counting only the distinct ones).

The product of its digits is 57600, while the sum is 37.

The square root of 25529428 is about 5052.6654351936. The cubic root of 25529428 is about 294.4514482835.

The spelling of 25529428 in words is "twenty-five million, five hundred twenty-nine thousand, four hundred twenty-eight".