28874432 has 28 divisors (see below), whose sum is σ = 60670440. Its totient is φ = 13587456.

The previous prime is 28874431. The next prime is 28874437. The reversal of 28874432 is 23447882.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28874431) by changing a digit.

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, 12182 + ... + 14357.

Almost surely, 2^28874432 is an apocalyptic number.

It is an amenable number.

28874432 is an abundant number, since it is smaller than the sum of its proper divisors (31796008).

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

28874432 is a wasteful number, since it uses less digits than its factorization.

28874432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26568 (or 26558 counting only the distinct ones).

The product of its digits is 86016, while the sum is 38.

The square root of 28874432 is about 5373.4934632881. The cubic root of 28874432 is about 306.7876103508.

The spelling of 28874432 in words is "twenty-eight million, eight hundred seventy-four thousand, four hundred thirty-two".