28791250704 has 120 divisors (see below), whose sum is σ = 81253504800. Its totient is φ = 9516648960.

The previous prime is 28791250687. The next prime is 28791250717. The reversal of 28791250704 is 40705219782.

It is a happy number.

It is a super-2 number, since 2×28791250704² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28791250704.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 10541019 + ... + 10543749.

It is an arithmetic number, because the mean of its divisors is an integer number (677112540).

Almost surely, 2^28791250704 is an apocalyptic number.

28791250704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28791250704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40626752400).

28791250704 is an abundant number, since it is smaller than the sum of its proper divisors (52462254096).

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

28791250704 is a wasteful number, since it uses less digits than its factorization.

28791250704 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3333 (or 3324 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The spelling of 28791250704 in words is "twenty-eight billion, seven hundred ninety-one million, two hundred fifty thousand, seven hundred four".