28863267840 has 1232 divisors, whose sum is σ = 122428941120. Its totient is φ = 6449725440.

The previous prime is 28863267799. The next prime is 28863267857. The reversal of 28863267840 is 4876236882.

28863267840 is a `hidden beast` number, since 288 + 63 + 267 + 8 + 40 = 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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 111 ways as a sum of consecutive naturals, for example, 780088302 + ... + 780088338.

Almost surely, 2^28863267840 is an apocalyptic number.

28863267840 is a gapful number since it is divisible by the number (20) 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 28863267840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61214470560).

28863267840 is an abundant number, since it is smaller than the sum of its proper divisors (93565673280).

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

28863267840 is a wasteful number, since it uses less digits than its factorization.

28863267840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 6193152, while the sum is 54.

The spelling of 28863267840 in words is "twenty-eight billion, eight hundred sixty-three million, two hundred sixty-seven thousand, eight hundred forty".