82731906 has 12 divisors (see below), whose sum is σ = 179252502. Its totient is φ = 27577296.

The previous prime is 82731899. The next prime is 82731907. The reversal of 82731906 is 60913728.

It can be written as a sum of positive squares in only one way, i.e., 81270225 + 1461681 = 9015^2 + 1209^2 .

It is not an unprimeable number, because it can be changed into a prime (82731907) 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 5 ways as a sum of consecutive naturals, for example, 2298091 + ... + 2298126.

Almost surely, 2^82731906 is an apocalyptic number.

82731906 is an abundant number, since it is smaller than the sum of its proper divisors (96520596).

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

82731906 is a wasteful number, since it uses less digits than its factorization.

82731906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4596225 (or 4596222 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 36.

The square root of 82731906 is about 9095.7081087731. The cubic root of 82731906 is about 435.7369039486.

The spelling of 82731906 in words is "eighty-two million, seven hundred thirty-one thousand, nine hundred six".