81082076 has 12 divisors (see below), whose sum is σ = 142137072. Its totient is φ = 40471488.

The previous prime is 81082073. The next prime is 81082087. The reversal of 81082076 is 67028018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81082073) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14720 + ... + 19463.

It is an arithmetic number, because the mean of its divisors is an integer number (11844756).

Almost surely, 2^81082076 is an apocalyptic number.

It is an amenable number.

81082076 is a deficient number, since it is larger than the sum of its proper divisors (61054996).

81082076 is a wasteful number, since it uses less digits than its factorization.

81082076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34780 (or 34778 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 81082076 is about 9004.5586232752. The cubic root of 81082076 is about 432.8209625935.

The spelling of 81082076 in words is "eighty-one million, eighty-two thousand, seventy-six".