28154999739672 has 512 divisors, whose sum is σ = 89701613568000. Its totient is φ = 8116921612800.

The previous prime is 28154999739667. The next prime is 28154999739689. The reversal of 28154999739672 is 27693799945182.

28154999739672 is a `hidden beast` number, since 2 + 8 + 1 + 5 + 499 + 97 + 39 + 6 + 7 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 28154999739591 and 28154999739600.

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 127 ways as a sum of consecutive naturals, for example, 647949547 + ... + 647992997.

It is an arithmetic number, because the mean of its divisors is an integer number (175198464000).

Almost surely, 2^{28154999739672} 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 28154999739672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44850806784000).

28154999739672 is an abundant number, since it is smaller than the sum of its proper divisors (61546613828328).

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

28154999739672 is a wasteful number, since it uses less digits than its factorization.

28154999739672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43708 (or 43698 counting only the distinct ones).

The product of its digits is 3703553280, while the sum is 81.

The spelling of 28154999739672 in words is "twenty-eight trillion, one hundred fifty-four billion, nine hundred ninety-nine million, seven hundred thirty-nine thousand, six hundred seventy-two".