81827356 has 12 divisors (see below), whose sum is σ = 154213192. Its totient is φ = 37766448.

The previous prime is 81827351. The next prime is 81827359. The reversal of 81827356 is 65372818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81827351) 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 3 ways as a sum of consecutive naturals, for example, 786750 + ... + 786853.

Almost surely, 2^81827356 is an apocalyptic number.

It is an amenable number.

81827356 is a deficient number, since it is larger than the sum of its proper divisors (72385836).

81827356 is a wasteful number, since it uses less digits than its factorization.

81827356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1573620 (or 1573618 counting only the distinct ones).

The product of its digits is 80640, while the sum is 40.

The square root of 81827356 is about 9045.8474450988. The cubic root of 81827356 is about 434.1430365175.

The spelling of 81827356 in words is "eighty-one million, eight hundred twenty-seven thousand, three hundred fifty-six".