28874979934470 has 96 divisors (see below), whose sum is σ = 75878848150560. Its totient is φ = 7617605990400.

The previous prime is 28874979934469. The next prime is 28874979934477. The reversal of 28874979934470 is 7443997947882.

28874979934470 is a `hidden beast` number, since 2 + 8 + 8 + 7 + 49 + 79 + 9 + 34 + 470 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28874979934470.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28874979934477) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 21514120 + ... + 22816820.

It is an arithmetic number, because the mean of its divisors is an integer number (790404668235).

Almost surely, 2^{28874979934470} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28874979934470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37939424075280).

28874979934470 is an abundant number, since it is smaller than the sum of its proper divisors (47003868216090).

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

28874979934470 is a wasteful number, since it uses less digits than its factorization.

28874979934470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305350 (or 1305347 counting only the distinct ones).

The product of its (nonzero) digits is 6145155072, while the sum is 81.

The spelling of 28874979934470 in words is "twenty-eight trillion, eight hundred seventy-four billion, nine hundred seventy-nine million, nine hundred thirty-four thousand, four hundred seventy".