28577432 has 16 divisors (see below), whose sum is σ = 57704640. Its totient is φ = 13189536.

The previous prime is 28577407. The next prime is 28577473. The reversal of 28577432 is 23477582.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137288 + ... + 137495.

It is an arithmetic number, because the mean of its divisors is an integer number (3606540).

Almost surely, 2^28577432 is an apocalyptic number.

It is an amenable number.

28577432 is an abundant number, since it is smaller than the sum of its proper divisors (29127208).

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

28577432 is a wasteful number, since it uses less digits than its factorization.

28577432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274802 (or 274798 counting only the distinct ones).

The product of its digits is 94080, while the sum is 38.

The square root of 28577432 is about 5345.7863780739. The cubic root of 28577432 is about 305.7321192114.

The spelling of 28577432 in words is "twenty-eight million, five hundred seventy-seven thousand, four hundred thirty-two".