28918247339520 has 640 divisors, whose sum is σ = 128066547502080. Its totient is φ = 6008985354240.

The previous prime is 28918247339461. The next prime is 28918247339581. The reversal of 28918247339520 is 2593374281982.

28918247339520 is a `hidden beast` number, since 2 + 8 + 9 + 1 + 8 + 2 + 4 + 73 + 39 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (640).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2605504 + ... + 8038976.

It is an arithmetic number, because the mean of its divisors is an integer number (200103980472).

Almost surely, 2^{28918247339520} is an apocalyptic number.

28918247339520 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 28918247339520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64033273751040).

28918247339520 is an abundant number, since it is smaller than the sum of its proper divisors (99148300162560).

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

28918247339520 is a wasteful number, since it uses less digits than its factorization.

28918247339520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5433523 (or 5433501 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 28918247339520 in words is "twenty-eight trillion, nine hundred eighteen billion, two hundred forty-seven million, three hundred thirty-nine thousand, five hundred twenty".