28423327680 has 280 divisors, whose sum is σ = 110299408560. Its totient is φ = 6890434560.

The previous prime is 28423327631. The next prime is 28423327763. The reversal of 28423327680 is 8672332482.

28423327680 is a `hidden beast` number, since 284 + 23 + 3 + 276 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 39 ways as a sum of consecutive naturals, for example, 235276 + ... + 334964.

Almost surely, 2^28423327680 is an apocalyptic number.

28423327680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28423327680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55149704280).

28423327680 is an abundant number, since it is smaller than the sum of its proper divisors (81876080880).

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

28423327680 is a wasteful number, since it uses less digits than its factorization.

28423327680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99729 (or 99710 counting only the distinct ones).

The product of its (nonzero) digits is 774144, while the sum is 45.

The spelling of 28423327680 in words is "twenty-eight billion, four hundred twenty-three million, three hundred twenty-seven thousand, six hundred eighty".