81730852 has 12 divisors (see below), whose sum is σ = 163461760. Its totient is φ = 35027496.

The previous prime is 81730829. The next prime is 81730853. The reversal of 81730852 is 25803718.

81730852 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (81730853) 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, 1459452 + ... + 1459507.

Almost surely, 2^81730852 is an apocalyptic number.

It is an amenable number.

81730852 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81730852 is a wasteful number, since it uses less digits than its factorization.

81730852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2918970 (or 2918968 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 34.

The square root of 81730852 is about 9040.5117111810. The cubic root of 81730852 is about 433.9722989108.

The spelling of 81730852 in words is "eighty-one million, seven hundred thirty thousand, eight hundred fifty-two".