28047534121854 has 576 divisors, whose sum is σ = 71462120970240. Its totient is φ = 7926107904000.

The previous prime is 28047534121843. The next prime is 28047534121883. The reversal of 28047534121854 is 45812143574082.

28047534121854 is a `hidden beast` number, since 2 + 8 + 0 + 4 + 7 + 534 + 1 + 21 + 85 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 28047534121854.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 84735752469 + ... + 84735752799.

It is an arithmetic number, because the mean of its divisors is an integer number (124066182240).

Almost surely, 2^{28047534121854} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28047534121854, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35731060485120).

28047534121854 is an abundant number, since it is smaller than the sum of its proper divisors (43414586848386).

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

28047534121854 is a wasteful number, since it uses less digits than its factorization.

28047534121854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 809 (or 793 counting only the distinct ones).

The product of its (nonzero) digits is 8601600, while the sum is 54.

The spelling of 28047534121854 in words is "twenty-eight trillion, forty-seven billion, five hundred thirty-four million, one hundred twenty-one thousand, eight hundred fifty-four".