28064461536 has 72 divisors (see below), whose sum is σ = 79837758000. Its totient is φ = 9351369216.

The previous prime is 28064461531. The next prime is 28064461549. The reversal of 28064461536 is 63516446082.

28064461536 is a `hidden beast` number, since 2 + 80 + 64 + 461 + 53 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (72).

It is a super-2 number, since 2×28064461536² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28064461491 and 28064461500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28064461531) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 833965 + ... + 866963.

It is an arithmetic number, because the mean of its divisors is an integer number (1108857750).

Almost surely, 2^28064461536 is an apocalyptic number.

It is an amenable number.

28064461536 is an abundant number, since it is smaller than the sum of its proper divisors (51773296464).

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

28064461536 is a wasteful number, since it uses less digits than its factorization.

28064461536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35968 (or 35957 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 45.

The spelling of 28064461536 in words is "twenty-eight billion, sixty-four million, four hundred sixty-one thousand, five hundred thirty-six".