28323778326 has 16 divisors (see below), whose sum is σ = 56975001264. Its totient is φ = 9386685344.

The previous prime is 28323778309. The next prime is 28323778331. The reversal of 28323778326 is 62387732382.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13642401 + ... + 13644476.

It is an arithmetic number, because the mean of its divisors is an integer number (3560937579).

Almost surely, 2^28323778326 is an apocalyptic number.

28323778326 is an abundant number, since it is smaller than the sum of its proper divisors (28651222938).

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

28323778326 is a wasteful number, since it uses less digits than its factorization.

28323778326 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27287055.

The product of its digits is 4064256, while the sum is 51.

The spelling of 28323778326 in words is "twenty-eight billion, three hundred twenty-three million, seven hundred seventy-eight thousand, three hundred twenty-six".