28018432 has 36 divisors (see below), whose sum is σ = 60236680. Its totient is φ = 12930048.

The previous prime is 28018429. The next prime is 28018447. The reversal of 28018432 is 23481082.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28018432.

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, 882 + ... + 7537.

Almost surely, 2^28018432 is an apocalyptic number.

It is an amenable number.

28018432 is an abundant number, since it is smaller than the sum of its proper divisors (32218248).

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

28018432 is an equidigital number, since it uses as much as digits as its factorization.

28018432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8448 (or 8434 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 28018432 is about 5293.2439958876. The cubic root of 28018432 is about 303.7255140101.

The spelling of 28018432 in words is "twenty-eight million, eighteen thousand, four hundred thirty-two".