28671696400 has 30 divisors (see below), whose sum is σ = 68883751562. Its totient is φ = 11468678400.

The previous prime is 28671696337. The next prime is 28671696413. The reversal of 28671696400 is 469617682.

It can be written as a sum of positive squares in 3 ways, for example, as 253828624 + 28417867776 = 15932^2 + 168576^2 .

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 5 ways as a sum of consecutive naturals, for example, 35839221 + ... + 35840020.

Almost surely, 2^28671696400 is an apocalyptic number.

28671696400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28671696400 is an abundant number, since it is smaller than the sum of its proper divisors (40212055162).

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

28671696400 is a wasteful number, since it uses less digits than its factorization.

28671696400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71679259 (or 71679248 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 49.

The spelling of 28671696400 in words is "twenty-eight billion, six hundred seventy-one million, six hundred ninety-six thousand, four hundred".