28087432 has 16 divisors (see below), whose sum is σ = 52784640. Its totient is φ = 14011536.

The previous prime is 28087429. The next prime is 28087441. The reversal of 28087432 is 23478082.

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, 88 + ... + 7495.

It is an arithmetic number, because the mean of its divisors is an integer number (3299040).

Almost surely, 2^28087432 is an apocalyptic number.

It is an amenable number.

28087432 is a deficient number, since it is larger than the sum of its proper divisors (24697208).

28087432 is a wasteful number, since it uses less digits than its factorization.

28087432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8052 (or 8048 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The square root of 28087432 is about 5299.7577303118. The cubic root of 28087432 is about 303.9746343101.

The spelling of 28087432 in words is "twenty-eight million, eighty-seven thousand, four hundred thirty-two".