28640035543896 has 144 divisors (see below), whose sum is σ = 94979709934200. Its totient is φ = 7752190053888.

The previous prime is 28640035543831. The next prime is 28640035543901. The reversal of 28640035543896 is 69834553004682.

28640035543896 is a `hidden beast` number, since 2 + 8 + 6 + 4 + 0 + 0 + 3 + 5 + 543 + 89 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 35 ways as a sum of consecutive naturals, for example, 213562545 + ... + 213696608.

Almost surely, 2^{28640035543896} is an apocalyptic number.

It is an amenable number.

28640035543896 is an abundant number, since it is smaller than the sum of its proper divisors (66339674390304).

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

28640035543896 is a wasteful number, since it uses less digits than its factorization.

28640035543896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 427259198 (or 427259184 counting only the distinct ones).

The product of its (nonzero) digits is 149299200, while the sum is 63.

The spelling of 28640035543896 in words is "twenty-eight trillion, six hundred forty billion, thirty-five million, five hundred forty-three thousand, eight hundred ninety-six".