28672974921864 has 256 divisors, whose sum is σ = 92875252377600. Its totient is φ = 7163533375488.

The previous prime is 28672974921847. The next prime is 28672974921919. The reversal of 28672974921864 is 46812947927682.

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, 836002764 + ... + 836037060.

It is an arithmetic number, because the mean of its divisors is an integer number (362793954600).

Almost surely, 2^{28672974921864} is an apocalyptic number.

28672974921864 is a gapful number since it is divisible by the number (24) 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 28672974921864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46437626188800).

28672974921864 is an abundant number, since it is smaller than the sum of its proper divisors (64202277455736).

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

28672974921864 is a wasteful number, since it uses less digits than its factorization.

28672974921864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54492 (or 54488 counting only the distinct ones).

The product of its digits is 1170505728, while the sum is 75.

The spelling of 28672974921864 in words is "twenty-eight trillion, six hundred seventy-two billion, nine hundred seventy-four million, nine hundred twenty-one thousand, eight hundred sixty-four".