80871790 has 16 divisors (see below), whose sum is σ = 153231120. Its totient is φ = 30646080.

The previous prime is 80871781. The next prime is 80871793. The reversal of 80871790 is 9717808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (80871793) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212631 + ... + 213010.

It is an arithmetic number, because the mean of its divisors is an integer number (9576945).

Almost surely, 2^80871790 is an apocalyptic number.

80871790 is a deficient number, since it is larger than the sum of its proper divisors (72359330).

80871790 is a wasteful number, since it uses less digits than its factorization.

80871790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 425667.

The product of its (nonzero) digits is 28224, while the sum is 40.

The square root of 80871790 is about 8992.8744014358. The cubic root of 80871790 is about 432.4464655803.

The spelling of 80871790 in words is "eighty million, eight hundred seventy-one thousand, seven hundred ninety".