28407432 has 32 divisors (see below), whose sum is σ = 74757600. Its totient is φ = 8970624.

The previous prime is 28407403. The next prime is 28407473. The reversal of 28407432 is 23470482.

It is a self number, because there is not a number n which added to its sum of digits gives 28407432.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30693 + ... + 31604.

It is an arithmetic number, because the mean of its divisors is an integer number (2336175).

Almost surely, 2^28407432 is an apocalyptic number.

It is an amenable number.

28407432 is an abundant number, since it is smaller than the sum of its proper divisors (46350168).

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

28407432 is a wasteful number, since it uses less digits than its factorization.

28407432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62325 (or 62321 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 30.

The square root of 28407432 is about 5329.8622871515. The cubic root of 28407432 is about 305.1246717770.

The spelling of 28407432 in words is "twenty-eight million, four hundred seven thousand, four hundred thirty-two".