28807800 has 192 divisors, whose sum is σ = 107731200. Its totient is φ = 6238080.

The previous prime is 28807783. The next prime is 28807811. The reversal of 28807800 is 870882.

It is a Saint-Exupery number, since it is equal to the product of the sides of a Pythagorean triangle: 475 × 133 × 456.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1516191 + ... + 1516209.

It is an arithmetic number, because the mean of its divisors is an integer number (561100).

Almost surely, 2^28807800 is an apocalyptic number.

28807800 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 28807800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53865600).

28807800 is an abundant number, since it is smaller than the sum of its proper divisors (78923400).

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

28807800 is a wasteful number, since it uses less digits than its factorization.

28807800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83 (or 36 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 33.

The square root of 28807800 is about 5367.2898188937. The cubic root of 28807800 is about 306.5514427447.

The spelling of 28807800 in words is "twenty-eight million, eight hundred seven thousand, eight hundred".