80851240 has 32 divisors (see below), whose sum is σ = 185004000. Its totient is φ = 31791424.

The previous prime is 80851229. The next prime is 80851247. The reversal of 80851240 is 4215808.

It is a junction number, because it is equal to n+sod(n) for n = 80851199 and 80851208.

It is not an unprimeable number, because it can be changed into a prime (80851247) 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, 14770 + ... + 19489.

It is an arithmetic number, because the mean of its divisors is an integer number (5781375).

Almost surely, 2^80851240 is an apocalyptic number.

It is an amenable number.

80851240 is an abundant number, since it is smaller than the sum of its proper divisors (104152760).

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

80851240 is a wasteful number, since it uses less digits than its factorization.

80851240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34329 (or 34325 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 28.

The square root of 80851240 is about 8991.7317575648. The cubic root of 80851240 is about 432.4098334094.

The spelling of 80851240 in words is "eighty million, eight hundred fifty-one thousand, two hundred forty".