28945332 has 72 divisors (see below), whose sum is σ = 79579136. Its totient is φ = 8817984.

The previous prime is 28945331. The next prime is 28945349. The reversal of 28945332 is 23354982.

28945332 is a `hidden beast` number, since 289 + 45 + 332 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28945331) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 59193 + ... + 59679.

Almost surely, 2^28945332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28945332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39789568).

28945332 is an abundant number, since it is smaller than the sum of its proper divisors (50633804).

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

28945332 is a wasteful number, since it uses less digits than its factorization.

28945332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637 (or 632 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 28945332 is about 5380.0866164031. The cubic root of 28945332 is about 307.0385066307.

The spelling of 28945332 in words is "twenty-eight million, nine hundred forty-five thousand, three hundred thirty-two".