28718433515520 has 3840 divisors, whose sum is σ = 131514679296000. Its totient is φ = 5843164594176.

The previous prime is 28718433515509. The next prime is 28718433515567. The reversal of 28718433515520 is 2551533481782.

28718433515520 is a `hidden beast` number, since 2 + 8 + 7 + 1 + 8 + 4 + 33 + 51 + 552 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (3840).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 226129397697 + ... + 226129397823.

It is an arithmetic number, because the mean of its divisors is an integer number (34248614400).

Almost surely, 2^{28718433515520} is an apocalyptic number.

28718433515520 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 28718433515520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65757339648000).

28718433515520 is an abundant number, since it is smaller than the sum of its proper divisors (102796245780480).

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

28718433515520 is a wasteful number, since it uses less digits than its factorization.

28718433515520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298 (or 269 counting only the distinct ones).

The product of its (nonzero) digits is 8064000, while the sum is 54.

The spelling of 28718433515520 in words is "twenty-eight trillion, seven hundred eighteen billion, four hundred thirty-three million, five hundred fifteen thousand, five hundred twenty".