28872396 has 96 divisors (see below), whose sum is σ = 86428160. Its totient is φ = 8164800.

The previous prime is 28872379. The next prime is 28872397. The reversal of 28872396 is 69327882.

It is not an unprimeable number, because it can be changed into a prime (28872397) 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 31 ways as a sum of consecutive naturals, for example, 136731 + ... + 136941.

Almost surely, 2^28872396 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 28872396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43214080).

28872396 is an abundant number, since it is smaller than the sum of its proper divisors (57555764).

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

28872396 is a wasteful number, since it uses less digits than its factorization.

28872396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412 (or 404 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28872396 is about 5373.3040114998. The cubic root of 28872396 is about 306.7803994239.

The spelling of 28872396 in words is "twenty-eight million, eight hundred seventy-two thousand, three hundred ninety-six".