28477079808 has 72 divisors (see below), whose sum is σ = 75976706400. Its totient is φ = 9469046784.

The previous prime is 28477079791. The next prime is 28477079819. The reversal of 28477079808 is 80897077482.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 268783 + ... + 359441.

Almost surely, 2^28477079808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28477079808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37988353200).

28477079808 is an abundant number, since it is smaller than the sum of its proper divisors (47499626592).

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

28477079808 is an equidigital number, since it uses as much as digits as its factorization.

28477079808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91087 (or 91073 counting only the distinct ones).

The product of its (nonzero) digits is 12644352, while the sum is 60.

The spelling of 28477079808 in words is "twenty-eight billion, four hundred seventy-seven million, seventy-nine thousand, eight hundred eight".