28719974400 has 576 divisors, whose sum is σ = 107771227200. Its totient is φ = 6688604160.

The previous prime is 28719974363. The next prime is 28719974461. The reversal of 28719974400 is 447991782.

It is a congruent 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 47 ways as a sum of consecutive naturals, for example, 37938822 + ... + 37939578.

It is an arithmetic number, because the mean of its divisors is an integer number (187102825).

Almost surely, 2^28719974400 is an apocalyptic number.

28719974400 is a gapful number since it is divisible by the number (20) 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 28719974400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (53885613600).

28719974400 is an abundant number, since it is smaller than the sum of its proper divisors (79051252800).

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

28719974400 is a wasteful number, since it uses less digits than its factorization.

28719974400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 824 (or 799 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 28719974400 in words is "twenty-eight billion, seven hundred nineteen million, nine hundred seventy-four thousand, four hundred".