28918732 has 24 divisors (see below), whose sum is σ = 51826320. Its totient is φ = 14114880.

The previous prime is 28918727. The next prime is 28918733. The reversal of 28918732 is 23781982.

It is not an unprimeable number, because it can be changed into a prime (28918733) 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 7 ways as a sum of consecutive naturals, for example, 42378 + ... + 43054.

It is an arithmetic number, because the mean of its divisors is an integer number (2159430).

Almost surely, 2^28918732 is an apocalyptic number.

It is an amenable number.

28918732 is a deficient number, since it is larger than the sum of its proper divisors (22907588).

28918732 is a wasteful number, since it uses less digits than its factorization.

28918732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 919 counting only the distinct ones).

The product of its digits is 48384, while the sum is 40.

The square root of 28918732 is about 5377.6139690387. The cubic root of 28918732 is about 306.9444243636.

The spelling of 28918732 in words is "twenty-eight million, nine hundred eighteen thousand, seven hundred thirty-two".