80321868 has 120 divisors (see below), whose sum is σ = 236780544. Its totient is φ = 23522400.

The previous prime is 80321861. The next prime is 80321897. The reversal of 80321868 is 86812308.

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

It is not an unprimeable number, because it can be changed into a prime (80321861) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 110121 + ... + 110847.

Almost surely, 2^80321868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 80321868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118390272).

80321868 is an abundant number, since it is smaller than the sum of its proper divisors (156458676).

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

80321868 is a wasteful number, since it uses less digits than its factorization.

80321868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 785 (or 774 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 36.

The square root of 80321868 is about 8962.2468165076. The cubic root of 80321868 is about 431.4640343974.

The spelling of 80321868 in words is "eighty million, three hundred twenty-one thousand, eight hundred sixty-eight".