81092286 has 32 divisors (see below), whose sum is σ = 196588800. Its totient is φ = 24573240.

The previous prime is 81092267. The next prime is 81092287. The reversal of 81092286 is 68229018.

It is a self number, because there is not a number n which added to its sum of digits gives 81092286.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81092287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67666 + ... + 68853.

It is an arithmetic number, because the mean of its divisors is an integer number (6143400).

Almost surely, 2^81092286 is an apocalyptic number.

81092286 is an abundant number, since it is smaller than the sum of its proper divisors (115496514).

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

81092286 is a wasteful number, since it uses less digits than its factorization.

81092286 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 136541 (or 136535 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 81092286 is about 9005.1255404908. The cubic root of 81092286 is about 432.8391290275.

It can be divided in two parts, 810 and 92286, that added together give a triangular number (93096 = T₄₃₁).

The spelling of 81092286 in words is "eighty-one million, ninety-two thousand, two hundred eighty-six".