28283100 has 72 divisors (see below), whose sum is σ = 85411200. Its totient is φ = 7212480.

The previous prime is 28283083. The next prime is 28283113. The reversal of 28283100 is 138282.

It is a super-2 number, since 2×28283100² = 1599867491220000, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4851 + ... + 8949.

Almost surely, 2^28283100 is an apocalyptic number.

28283100 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 28283100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42705600).

28283100 is an abundant number, since it is smaller than the sum of its proper divisors (57128100).

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

28283100 is a wasteful number, since it uses less digits than its factorization.

28283100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4139 (or 4132 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 24.

The square root of 28283100 is about 5318.1857808843. The cubic root of 28283100 is about 304.6788701040.

It can be divided in two parts, 28 and 283100, that added together give a triangular number (283128 = T₇₅₂).

The spelling of 28283100 in words is "twenty-eight million, two hundred eighty-three thousand, one hundred".