28320045732 has 36 divisors (see below), whose sum is σ = 78094672656. Its totient is φ = 8581831920.

The previous prime is 28320045727. The next prime is 28320045757. The reversal of 28320045732 is 23754002382.

28320045732 is a `hidden beast` number, since 2 + 83 + 2 + 0 + 0 + 4 + 573 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35757238 + ... + 35758029.

Almost surely, 2^28320045732 is an apocalyptic number.

28320045732 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

28320045732 is an abundant number, since it is smaller than the sum of its proper divisors (49774626924).

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

28320045732 is a wasteful number, since it uses less digits than its factorization.

28320045732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71515288 (or 71515283 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 36.

The spelling of 28320045732 in words is "twenty-eight billion, three hundred twenty million, forty-five thousand, seven hundred thirty-two".