28533029868 has 432 divisors, whose sum is σ = 92535206400. Its totient is φ = 7670013120.

The previous prime is 28533029813. The next prime is 28533029887. The reversal of 28533029868 is 86892033582.

28533029868 is a `hidden beast` number, since 2 + 8 + 533 + 0 + 29 + 86 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 467754558 + ... + 467754618.

Almost surely, 2^28533029868 is an apocalyptic number.

28533029868 is a gapful number since it is divisible by the number (28) 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 28533029868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46267603200).

28533029868 is an abundant number, since it is smaller than the sum of its proper divisors (64002176532).

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

28533029868 is an equidigital number, since it uses as much as digits as its factorization.

28533029868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 96 counting only the distinct ones).

The product of its (nonzero) digits is 4976640, while the sum is 54.

The spelling of 28533029868 in words is "twenty-eight billion, five hundred thirty-three million, twenty-nine thousand, eight hundred sixty-eight".