28959912 has 24 divisors (see below), whose sum is σ = 78433290. Its totient is φ = 9653280.

The previous prime is 28959907. The next prime is 28959913. The reversal of 28959912 is 21995982.

It can be written as a sum of positive squares in only one way, i.e., 21958596 + 7001316 = 4686^2 + 2646^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (28959913) 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 5 ways as a sum of consecutive naturals, for example, 201039 + ... + 201182.

Almost surely, 2^28959912 is an apocalyptic number.

It is an amenable number.

28959912 is an abundant number, since it is smaller than the sum of its proper divisors (49473378).

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

28959912 is a wasteful number, since it uses less digits than its factorization.

28959912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402233 (or 402226 counting only the distinct ones).

The product of its digits is 116640, while the sum is 45.

The square root of 28959912 is about 5381.4414425877. The cubic root of 28959912 is about 307.0900505780.

The spelling of 28959912 in words is "twenty-eight million, nine hundred fifty-nine thousand, nine hundred twelve".