80811988 has 12 divisors (see below), whose sum is σ = 144430272. Its totient is φ = 39546200.

The previous prime is 80811979. The next prime is 80811989. The reversal of 80811988 is 88911808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80811989) 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 3 ways as a sum of consecutive naturals, for example, 214738 + ... + 215113.

It is an arithmetic number, because the mean of its divisors is an integer number (12035856).

Almost surely, 2^80811988 is an apocalyptic number.

It is an amenable number.

80811988 is a deficient number, since it is larger than the sum of its proper divisors (63618284).

80811988 is a wasteful number, since it uses less digits than its factorization.

80811988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429902 (or 429900 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 43.

The square root of 80811988 is about 8989.5488207140. The cubic root of 80811988 is about 432.3398460341.

The spelling of 80811988 in words is "eighty million, eight hundred eleven thousand, nine hundred eighty-eight".