28166873388 has 24 divisors (see below), whose sum is σ = 65725475760. Its totient is φ = 9388561920.

The previous prime is 28166873359. The next prime is 28166873393. The reversal of 28166873388 is 88337866182.

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, 443128 + ... + 502688.

It is an arithmetic number, because the mean of its divisors is an integer number (2738561490).

Almost surely, 2^28166873388 is an apocalyptic number.

It is an amenable number.

28166873388 is an abundant number, since it is smaller than the sum of its proper divisors (37558602372).

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

28166873388 is a wasteful number, since it uses less digits than its factorization.

28166873388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98977 (or 98975 counting only the distinct ones).

The product of its digits is 18579456, while the sum is 60.

The spelling of 28166873388 in words is "twenty-eight billion, one hundred sixty-six million, eight hundred seventy-three thousand, three hundred eighty-eight".