28064441660 has 48 divisors (see below), whose sum is σ = 60243886080. Its totient is φ = 10976961600.

The previous prime is 28064441627. The next prime is 28064441681. The reversal of 28064441660 is 6614446082.

It is a super-2 number, since 2×28064441660² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1068971 + ... + 1094909.

It is an arithmetic number, because the mean of its divisors is an integer number (1255080960).

Almost surely, 2^28064441660 is an apocalyptic number.

28064441660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28064441660 is an abundant number, since it is smaller than the sum of its proper divisors (32179444420).

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

28064441660 is a wasteful number, since it uses less digits than its factorization.

28064441660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27146 (or 27144 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

The spelling of 28064441660 in words is "twenty-eight billion, sixty-four million, four hundred forty-one thousand, six hundred sixty".