28275883878 has 16 divisors (see below), whose sum is σ = 61692837696. Its totient is φ = 8568449640.

The previous prime is 28275883873. The next prime is 28275883901. The reversal of 28275883878 is 87838857282.

It is a Harshad number since it is a multiple of its sum of digits (66), and also a Moran number because the ratio is a prime number: 428422483 = 28275883878 / (2 + 8 + 2 + 7 + 5 + 8 + 8 + 3 + 8 + 7 + 8).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28275883873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 214211176 + ... + 214211307.

It is an arithmetic number, because the mean of its divisors is an integer number (3855802356).

Almost surely, 2^28275883878 is an apocalyptic number.

28275883878 is an abundant number, since it is smaller than the sum of its proper divisors (33416953818).

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

28275883878 is a wasteful number, since it uses less digits than its factorization.

28275883878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428422499.

The product of its digits is 96337920, while the sum is 66.

The spelling of 28275883878 in words is "twenty-eight billion, two hundred seventy-five million, eight hundred eighty-three thousand, eight hundred seventy-eight".