28876224 has 112 divisors (see below), whose sum is σ = 86026752. Its totient is φ = 8481792.

The previous prime is 28876207. The next prime is 28876229. The reversal of 28876224 is 42267882.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28876229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57157 + ... + 57659.

It is an arithmetic number, because the mean of its divisors is an integer number (768096).

Almost surely, 2^28876224 is an apocalyptic number.

28876224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28876224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43013376).

28876224 is an abundant number, since it is smaller than the sum of its proper divisors (57150528).

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

28876224 is a wasteful number, since it uses less digits than its factorization.

28876224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554 (or 544 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 28876224 is about 5373.6602051116. The cubic root of 28876224 is about 306.7939568194.

The spelling of 28876224 in words is "twenty-eight million, eight hundred seventy-six thousand, two hundred twenty-four".