28994542520832 has 2160 divisors, whose sum is σ = 108707975101440. Its totient is φ = 7679688081408.

The previous prime is 28994542520819. The next prime is 28994542520837. The reversal of 28994542520832 is 23802524549982.

It is a happy number.

28994542520832 is a `hidden beast` number, since 2 + 8 + 9 + 9 + 4 + 542 + 5 + 2 + 0 + 83 + 2 = 666.

It is a super-3 number, since 3×28994542520832³ (a number of 41 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 28994542520832.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28994542520837) by changing a digit.

It is a polite number, since it can be written in 215 ways as a sum of consecutive naturals, for example, 228303484353 + ... + 228303484479.

Almost surely, 2^{28994542520832} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28994542520832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54353987550720).

28994542520832 is an abundant number, since it is smaller than the sum of its proper divisors (79713432580608).

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

28994542520832 is an frugal number, since it uses more digits than its factorization.

28994542520832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275 (or 231 counting only the distinct ones).

The product of its (nonzero) digits is 99532800, while the sum is 63.

The spelling of 28994542520832 in words is "twenty-eight trillion, nine hundred ninety-four billion, five hundred forty-two million, five hundred twenty thousand, eight hundred thirty-two".