28432080 has 80 divisors (see below), whose sum is σ = 97940160. Its totient is φ = 7581312.

The previous prime is 28432067. The next prime is 28432087. The reversal of 28432080 is 8023482.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28432087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4422 + ... + 8741.

It is an arithmetic number, because the mean of its divisors is an integer number (1224252).

Almost surely, 2^28432080 is an apocalyptic number.

28432080 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28432080 is an abundant number, since it is smaller than the sum of its proper divisors (69508080).

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

28432080 is a wasteful number, since it uses less digits than its factorization.

28432080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13185 (or 13173 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 28432080 is about 5332.1740406705. The cubic root of 28432080 is about 305.2128944508.

The spelling of 28432080 in words is "twenty-eight million, four hundred thirty-two thousand, eighty".