28525432 has 16 divisors (see below), whose sum is σ = 57599640. Its totient is φ = 13165536.

The previous prime is 28525429. The next prime is 28525493. The reversal of 28525432 is 23452582.

It is a junction number, because it is equal to n+sod(n) for n = 28525394 and 28525403.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137038 + ... + 137245.

Almost surely, 2^28525432 is an apocalyptic number.

It is an amenable number.

28525432 is an abundant number, since it is smaller than the sum of its proper divisors (29074208).

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

28525432 is a wasteful number, since it uses less digits than its factorization.

28525432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274302 (or 274298 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 28525432 is about 5340.9205199104. The cubic root of 28525432 is about 305.5465681005.

The spelling of 28525432 in words is "twenty-eight million, five hundred twenty-five thousand, four hundred thirty-two".