28287002800 has 60 divisors (see below), whose sum is σ = 77668035376. Its totient is φ = 9698400000.

The previous prime is 28287002773. The next prime is 28287002803. The reversal of 28287002800 is 820078282.

It is a self number, because there is not a number n which added to its sum of digits gives 28287002800.

It is not an unprimeable number, because it can be changed into a prime (28287002803) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5048451 + ... + 5054050.

Almost surely, 2^28287002800 is an apocalyptic number.

28287002800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28287002800 is an abundant number, since it is smaller than the sum of its proper divisors (49381032576).

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

28287002800 is a wasteful number, since it uses less digits than its factorization.

28287002800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10102526 (or 10102515 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 37.

The spelling of 28287002800 in words is "twenty-eight billion, two hundred eighty-seven million, two thousand, eight hundred".