28032912 has 40 divisors (see below), whose sum is σ = 80466080. Its totient is φ = 9344160.

The previous prime is 28032899. The next prime is 28032967. The reversal of 28032912 is 21923082.

It is a happy number.

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

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, 32014 + ... + 32877.

It is an arithmetic number, because the mean of its divisors is an integer number (2011652).

Almost surely, 2^28032912 is an apocalyptic number.

It is an amenable number.

28032912 is an abundant number, since it is smaller than the sum of its proper divisors (52433168).

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

28032912 is a wasteful number, since it uses less digits than its factorization.

28032912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64908 (or 64896 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 28032912 is about 5294.6116004859. The cubic root of 28032912 is about 303.7778270498. Note that the first 3 decimals are identical.

Adding to 28032912 its reverse (21923082), we get a palindrome (49955994).

The spelling of 28032912 in words is "twenty-eight million, thirty-two thousand, nine hundred twelve".