28464667072840 has 32 divisors (see below), whose sum is σ = 65095427163960. Its totient is φ = 11199213273600.

The previous prime is 28464667072837. The next prime is 28464667072859. The reversal of 28464667072840 is 4827076646482.

It can be written as a sum of positive squares in 4 ways, for example, as 16369031689956 + 12095635382884 = 4045866^2 + 3477878^2 .

It is a Smith number, since the sum of its digits (64) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5832921141 + ... + 5832926020.

Almost surely, 2^{28464667072840} is an apocalyptic number.

28464667072840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28464667072840 is an abundant number, since it is smaller than the sum of its proper divisors (36630760091120).

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

28464667072840 is a wasteful number, since it uses less digits than its factorization.

28464667072840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11665847233 (or 11665847229 counting only the distinct ones).

The product of its (nonzero) digits is 173408256, while the sum is 64.

The spelling of 28464667072840 in words is "twenty-eight trillion, four hundred sixty-four billion, six hundred sixty-seven million, seventy-two thousand, eight hundred forty".