28321044732 has 18 divisors (see below), whose sum is σ = 71589307608. Its totient is φ = 9440348232.

The previous prime is 28321044709. The next prime is 28321044737. The reversal of 28321044732 is 23744012382.

It is a happy number.

28321044732 is a `hidden beast` number, since 2 + 83 + 2 + 104 + 473 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 786695687 = 28321044732 / (2 + 8 + 3 + 2 + 1 + 0 + 4 + 4 + 7 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28321044737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 393347808 + ... + 393347879.

It is an arithmetic number, because the mean of its divisors is an integer number (3977183756).

Almost surely, 2^28321044732 is an apocalyptic number.

It is an amenable number.

28321044732 is an abundant number, since it is smaller than the sum of its proper divisors (43268262876).

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

28321044732 is a wasteful number, since it uses less digits than its factorization.

28321044732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786695697 (or 786695692 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The spelling of 28321044732 in words is "twenty-eight billion, three hundred twenty-one million, forty-four thousand, seven hundred thirty-two".