2800280500 has 24 divisors (see below), whose sum is σ = 6115813704. Its totient is φ = 1120112000.

The previous prime is 2800280489. The next prime is 2800280501. The reversal of 2800280500 is 50820082.

It can be written as a sum of positive squares in 4 ways, for example, as 294877584 + 2505402916 = 17172^2 + 50054^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2800280501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2799781 + ... + 2800780.

It is an arithmetic number, because the mean of its divisors is an integer number (254825571).

Almost surely, 2^2800280500 is an apocalyptic number.

2800280500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2800280500 is an abundant number, since it is smaller than the sum of its proper divisors (3315533204).

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

2800280500 is a wasteful number, since it uses less digits than its factorization.

2800280500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5600580 (or 5600568 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 2800280500 is about 52917.6766307819. The cubic root of 2800280500 is about 1409.5068107294.

The spelling of 2800280500 in words is "two billion, eight hundred million, two hundred eighty thousand, five hundred".