28832280 has 64 divisors (see below), whose sum is σ = 87423840. Its totient is φ = 7606272.

The previous prime is 28832273. The next prime is 28832281. The reversal of 28832280 is 8223882.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28832281) 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, 10402 + ... + 12878.

Almost surely, 2^28832280 is an apocalyptic number.

28832280 is a gapful number since it is divisible by the number (20) 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 28832280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43711920).

28832280 is an abundant number, since it is smaller than the sum of its proper divisors (58591560).

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

28832280 is a wasteful number, since it uses less digits than its factorization.

28832280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2588 (or 2584 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28832280 is about 5369.5698151714. The cubic root of 28832280 is about 306.6382508852.

The spelling of 28832280 in words is "twenty-eight million, eight hundred thirty-two thousand, two hundred eighty".