28432944 has 120 divisors (see below), whose sum is σ = 84494592. Its totient is φ = 9253440.

The previous prime is 28432913. The next prime is 28432981. The reversal of 28432944 is 44923482.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28432899 and 28432908.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 275997 + ... + 276099.

Almost surely, 2^28432944 is an apocalyptic number.

28432944 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28432944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42247296).

28432944 is an abundant number, since it is smaller than the sum of its proper divisors (56061648).

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

28432944 is a wasteful number, since it uses less digits than its factorization.

28432944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 179 counting only the distinct ones).

The product of its digits is 55296, while the sum is 36.

The square root of 28432944 is about 5332.2550576656. The cubic root of 28432944 is about 305.2159860439.

The spelling of 28432944 in words is "twenty-eight million, four hundred thirty-two thousand, nine hundred forty-four".