28550076678 has 48 divisors (see below), whose sum is σ = 63849895200. Its totient is φ = 9212911488.

The previous prime is 28550076677. The next prime is 28550076683. The reversal of 28550076678 is 87667005582.

28550076678 is a `hidden beast` number, since 2 + 8 + 5 + 500 + 7 + 66 + 78 = 666.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28550076671) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24826 + ... + 240242.

It is an arithmetic number, because the mean of its divisors is an integer number (1330206150).

Almost surely, 2^28550076678 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28550076678, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31924947600).

28550076678 is an abundant number, since it is smaller than the sum of its proper divisors (35299818522).

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

28550076678 is a wasteful number, since it uses less digits than its factorization.

28550076678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215661 (or 215658 counting only the distinct ones).

The product of its (nonzero) digits is 5644800, while the sum is 54.

The spelling of 28550076678 in words is "twenty-eight billion, five hundred fifty million, seventy-six thousand, six hundred seventy-eight".