28017791792780 has 48 divisors (see below), whose sum is σ = 59197400881920. Its totient is φ = 11138555533248.

The previous prime is 28017791792779. The next prime is 28017791792791. The reversal of 28017791792780 is 8729719771082.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 28017791792780.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25251731 + ... + 26337909.

It is an arithmetic number, because the mean of its divisors is an integer number (1233279185040).

Almost surely, 2^{28017791792780} is an apocalyptic number.

28017791792780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28017791792780 is an abundant number, since it is smaller than the sum of its proper divisors (31179609089140).

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

28017791792780 is a wasteful number, since it uses less digits than its factorization.

28017791792780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094078 (or 1094076 counting only the distinct ones).

The product of its (nonzero) digits is 49787136, while the sum is 68.

The spelling of 28017791792780 in words is "twenty-eight trillion, seventeen billion, seven hundred ninety-one million, seven hundred ninety-two thousand, seven hundred eighty".