28477885818 has 32 divisors (see below), whose sum is σ = 62251476480. Its totient is φ = 8646036480.

The previous prime is 28477885817. The next prime is 28477885823. The reversal of 28477885818 is 81858877482.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (28477885817) 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 15 ways as a sum of consecutive naturals, for example, 4499983 + ... + 4506306.

It is an arithmetic number, because the mean of its divisors is an integer number (1945358640).

Almost surely, 2^28477885818 is an apocalyptic number.

28477885818 is an abundant number, since it is smaller than the sum of its proper divisors (33773590662).

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

28477885818 is a wasteful number, since it uses less digits than its factorization.

28477885818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9006342.

The product of its digits is 64225280, while the sum is 66.

The spelling of 28477885818 in words is "twenty-eight billion, four hundred seventy-seven million, eight hundred eighty-five thousand, eight hundred eighteen".