28316891232 has 144 divisors (see below), whose sum is σ = 96031353600. Its totient is φ = 7738765056.

The previous prime is 28316891227. The next prime is 28316891233. The reversal of 28316891232 is 23219861382.

28316891232 is a `hidden beast` number, since 28 + 316 + 89 + 1 + 232 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28316891233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258982 + ... + 351717.

It is an arithmetic number, because the mean of its divisors is an integer number (666884400).

Almost surely, 2^28316891232 is an apocalyptic number.

It is an amenable number.

28316891232 is an abundant number, since it is smaller than the sum of its proper divisors (67714462368).

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

28316891232 is a wasteful number, since it uses less digits than its factorization.

28316891232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 610745 (or 610734 counting only the distinct ones).

The product of its digits is 248832, while the sum is 45.

The spelling of 28316891232 in words is "twenty-eight billion, three hundred sixteen million, eight hundred ninety-one thousand, two hundred thirty-two".