28230403788 has 72 divisors (see below), whose sum is σ = 71989112832. Its totient is φ = 9327340512.

The previous prime is 28230403781. The next prime is 28230403807. The reversal of 28230403788 is 88730403282.

28230403788 is a `hidden beast` number, since 2 + 8 + 230 + 40 + 378 + 8 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (28230403781) 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 23 ways as a sum of consecutive naturals, for example, 6522081 + ... + 6526407.

Almost surely, 2^28230403788 is an apocalyptic number.

It is an amenable number.

28230403788 is an abundant number, since it is smaller than the sum of its proper divisors (43758709044).

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

28230403788 is a wasteful number, since it uses less digits than its factorization.

28230403788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891 (or 5886 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 45.

The spelling of 28230403788 in words is "twenty-eight billion, two hundred thirty million, four hundred three thousand, seven hundred eighty-eight".