28743432 has 32 divisors (see below), whose sum is σ = 72031680. Its totient is φ = 9558080.

The previous prime is 28743401. The next prime is 28743467. The reversal of 28743432 is 23434782.

It is a junction number, because it is equal to n+sod(n) for n = 28743393 and 28743402.

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, 10882 + ... + 13262.

It is an arithmetic number, because the mean of its divisors is an integer number (2250990).

Almost surely, 2^28743432 is an apocalyptic number.

It is an amenable number.

28743432 is an abundant number, since it is smaller than the sum of its proper divisors (43288248).

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

28743432 is a wasteful number, since it uses less digits than its factorization.

28743432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893 (or 2889 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 28743432 is about 5361.2901432398. The cubic root of 28743432 is about 306.3229534932.

The spelling of 28743432 in words is "twenty-eight million, seven hundred forty-three thousand, four hundred thirty-two".