28000780324 has 12 divisors (see below), whose sum is σ = 53456035248. Its totient is φ = 12727627400.

The previous prime is 28000780319. The next prime is 28000780333. The reversal of 28000780324 is 42308700082.

It is a self number, because there is not a number n which added to its sum of digits gives 28000780324.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318190642 + ... + 318190729.

It is an arithmetic number, because the mean of its divisors is an integer number (4454669604).

Almost surely, 2^28000780324 is an apocalyptic number.

It is an amenable number.

28000780324 is a deficient number, since it is larger than the sum of its proper divisors (25455254924).

28000780324 is a wasteful number, since it uses less digits than its factorization.

28000780324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 636381386 (or 636381384 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 34.

The spelling of 28000780324 in words is "twenty-eight billion, seven hundred eighty thousand, three hundred twenty-four".