28561862406 has 64 divisors (see below), whose sum is σ = 71242569216. Its totient is φ = 7416230400.

The previous prime is 28561862389. The next prime is 28561862429. The reversal of 28561862406 is 60426816582.

It is a super-2 number, since 2×28561862406² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

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 31 ways as a sum of consecutive naturals, for example, 1716366 + ... + 1732926.

It is an arithmetic number, because the mean of its divisors is an integer number (1113165144).

Almost surely, 2^28561862406 is an apocalyptic number.

28561862406 is an abundant number, since it is smaller than the sum of its proper divisors (42680706810).

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

28561862406 is a wasteful number, since it uses less digits than its factorization.

28561862406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20317.

The product of its (nonzero) digits is 1105920, while the sum is 48.

The spelling of 28561862406 in words is "twenty-eight billion, five hundred sixty-one million, eight hundred sixty-two thousand, four hundred six".