28943292 has 96 divisors (see below), whose sum is σ = 82059264. Its totient is φ = 7761600.

The previous prime is 28943273. The next prime is 28943293. The reversal of 28943292 is 29234982.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28943292.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28943293) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 137067 + ... + 137277.

It is an arithmetic number, because the mean of its divisors is an integer number (854784).

Almost surely, 2^28943292 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 28943292, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41029632).

28943292 is an abundant number, since it is smaller than the sum of its proper divisors (53115972).

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

28943292 is a wasteful number, since it uses less digits than its factorization.

28943292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 317 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 28943292 is about 5379.8970250368. The cubic root of 28943292 is about 307.0312933402.

The spelling of 28943292 in words is "twenty-eight million, nine hundred forty-three thousand, two hundred ninety-two".