81290676 has 12 divisors (see below), whose sum is σ = 189678272. Its totient is φ = 27096888.

The previous prime is 81290663. The next prime is 81290681. The reversal of 81290676 is 67609218.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

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, 3387100 + ... + 3387123.

Almost surely, 2^81290676 is an apocalyptic number.

It is an amenable number.

81290676 is an abundant number, since it is smaller than the sum of its proper divisors (108387596).

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

81290676 is a wasteful number, since it uses less digits than its factorization.

81290676 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6774230 (or 6774228 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 81290676 is about 9016.1342048574. The cubic root of 81290676 is about 433.1918178265.

The spelling of 81290676 in words is "eighty-one million, two hundred ninety thousand, six hundred seventy-six".