28401406663 has 16 divisors (see below), whose sum is σ = 34198712320. Its totient is φ = 23041462176.

The previous prime is 28401406651. The next prime is 28401406667. The reversal of 28401406663 is 36660410482.

It is a cyclic number.

It is not a de Polignac number, because 28401406663 - 2²⁵ = 28367852231 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28401406667) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 46345 + ... + 242797.

It is an arithmetic number, because the mean of its divisors is an integer number (2137419520).

Almost surely, 2^28401406663 is an apocalyptic number.

28401406663 is a deficient number, since it is larger than the sum of its proper divisors (5797305657).

28401406663 is a wasteful number, since it uses less digits than its factorization.

28401406663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197566.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 28401406663 in words is "twenty-eight billion, four hundred one million, four hundred six thousand, six hundred sixty-three".