28314471680 has 72 divisors (see below), whose sum is σ = 73987681824. Its totient is φ = 10296166400.

The previous prime is 28314471677. The next prime is 28314471719. The reversal of 28314471680 is 8617441382.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 991406 + ... + 1019565.

It is an arithmetic number, because the mean of its divisors is an integer number (1027606692).

Almost surely, 2^28314471680 is an apocalyptic number.

28314471680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28314471680 is an abundant number, since it is smaller than the sum of its proper divisors (45673210144).

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

28314471680 is a wasteful number, since it uses less digits than its factorization.

28314471680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011003 (or 2010989 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 44.

It can be divided in two parts, 28314 and 471680, that added together give a palindrome (499994).

The spelling of 28314471680 in words is "twenty-eight billion, three hundred fourteen million, four hundred seventy-one thousand, six hundred eighty".