28474432 has 28 divisors (see below), whose sum is σ = 64576960. Its totient is φ = 12203136.

The previous prime is 28474427. The next prime is 28474451. The reversal of 28474432 is 23447482.

It is a tau number, because it is divible by the number of its divisors (28).

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, 31332 + ... + 32227.

It is an arithmetic number, because the mean of its divisors is an integer number (2306320).

Almost surely, 2^28474432 is an apocalyptic number.

It is an amenable number.

28474432 is an abundant number, since it is smaller than the sum of its proper divisors (36102528).

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

28474432 is an equidigital number, since it uses as much as digits as its factorization.

28474432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63578 (or 63568 counting only the distinct ones).

The product of its digits is 43008, while the sum is 34.

The square root of 28474432 is about 5336.1439260949. The cubic root of 28474432 is about 305.3643661159.

The spelling of 28474432 in words is "twenty-eight million, four hundred seventy-four thousand, four hundred thirty-two".