28418131800 has 96 divisors (see below), whose sum is σ = 97884694800. Its totient is φ = 7578167040.

The previous prime is 28418131789. The next prime is 28418131801. The reversal of 28418131800 is 813181482.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28418131801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2625909 + ... + 2636708.

Almost surely, 2^28418131800 is an apocalyptic number.

28418131800 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28418131800 is an abundant number, since it is smaller than the sum of its proper divisors (69466563000).

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

28418131800 is a wasteful number, since it uses less digits than its factorization.

28418131800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5262642 (or 5262627 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The spelling of 28418131800 in words is "twenty-eight billion, four hundred eighteen million, one hundred thirty-one thousand, eight hundred".