83728866 has 16 divisors (see below), whose sum is σ = 180339264. Its totient is φ = 25762704.

The previous prime is 83728849. The next prime is 83728871. The reversal of 83728866 is 66882738.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 536646 + ... + 536801.

It is an arithmetic number, because the mean of its divisors is an integer number (11271204).

Almost surely, 2^83728866 is an apocalyptic number.

83728866 is an abundant number, since it is smaller than the sum of its proper divisors (96610398).

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

83728866 is a wasteful number, since it uses less digits than its factorization.

83728866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073465.

The product of its digits is 774144, while the sum is 48.

The square root of 83728866 is about 9150.3478622400. The cubic root of 83728866 is about 437.4802011176.

The spelling of 83728866 in words is "eighty-three million, seven hundred twenty-eight thousand, eight hundred sixty-six".