28099447722 has 40 divisors (see below), whose sum is σ = 63340665696. Its totient is φ = 9310386888.

The previous prime is 28099447709. The next prime is 28099447763. The reversal of 28099447722 is 22774499082.

It is a happy number.

28099447722 is a `hidden beast` number, since 2 + 80 + 9 + 94 + 477 + 2 + 2 = 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 (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 492268 + ... + 546375.

Almost surely, 2^28099447722 is an apocalyptic number.

28099447722 is an abundant number, since it is smaller than the sum of its proper divisors (35241217974).

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

28099447722 is a wasteful number, since it uses less digits than its factorization.

28099447722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1038824 (or 1038815 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 28099447722 in words is "twenty-eight billion, ninety-nine million, four hundred forty-seven thousand, seven hundred twenty-two".