28303982172 has 48 divisors (see below), whose sum is σ = 73444116480. Its totient is φ = 9426506544.

The previous prime is 28303982099. The next prime is 28303982177. The reversal of 28303982172 is 27128930382.

It is a super-2 number, since 2×28303982172² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28303982177) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 12933 + ... + 238275.

It is an arithmetic number, because the mean of its divisors is an integer number (1530085760).

Almost surely, 2^28303982172 is an apocalyptic number.

It is an amenable number.

28303982172 is an abundant number, since it is smaller than the sum of its proper divisors (45140134308).

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

28303982172 is a wasteful number, since it uses less digits than its factorization.

28303982172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226519 (or 226511 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 28303982172 in words is "twenty-eight billion, three hundred three million, nine hundred eighty-two thousand, one hundred seventy-two".