81206832 has 40 divisors (see below), whose sum is σ = 239754496. Its totient is φ = 23201856.

The previous prime is 81206831. The next prime is 81206843. The reversal of 81206832 is 23860218.

It is a self number, because there is not a number n which added to its sum of digits gives 81206832.

It is not an unprimeable number, because it can be changed into a prime (81206831) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 120508 + ... + 121179.

Almost surely, 2^81206832 is an apocalyptic number.

It is an amenable number.

81206832 is an abundant number, since it is smaller than the sum of its proper divisors (158547664).

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

81206832 is a wasteful number, since it uses less digits than its factorization.

81206832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241705 (or 241699 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 81206832 is about 9011.4833407159. The cubic root of 81206832 is about 433.0428338313.

The spelling of 81206832 in words is "eighty-one million, two hundred six thousand, eight hundred thirty-two".