80381889 has 20 divisors (see below), whose sum is σ = 137231424. Its totient is φ = 45932184.

The previous prime is 80381887. The next prime is 80381897. The reversal of 80381889 is 98818308.

It is not a de Polignac number, because 80381889 - 2¹ = 80381887 is a prime.

It is a super-2 number, since 2×80381889² = 12922496158416642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (80381887) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 70317 + ... + 71450.

Almost surely, 2^80381889 is an apocalyptic number.

It is an amenable number.

80381889 is a deficient number, since it is larger than the sum of its proper divisors (56849535).

80381889 is a wasteful number, since it uses less digits than its factorization.

80381889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141786 (or 141777 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 80381889 is about 8965.5947376624. The cubic root of 80381889 is about 431.5714790057.

The spelling of 80381889 in words is "eighty million, three hundred eighty-one thousand, eight hundred eighty-nine".