80261856 has 36 divisors (see below), whose sum is σ = 228245472. Its totient is φ = 26753856.

The previous prime is 80261837. The next prime is 80261869. The reversal of 80261856 is 65816208.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 80261856.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 139056 + ... + 139631.

It is an arithmetic number, because the mean of its divisors is an integer number (6340152).

Almost surely, 2^80261856 is an apocalyptic number.

It is an amenable number.

80261856 is an abundant number, since it is smaller than the sum of its proper divisors (147983616).

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

80261856 is a wasteful number, since it uses less digits than its factorization.

80261856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278703 (or 278692 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 80261856 is about 8958.8981465357. The cubic root of 80261856 is about 431.3565523730.

The spelling of 80261856 in words is "eighty million, two hundred sixty-one thousand, eight hundred fifty-six".