81760030 has 16 divisors (see below), whose sum is σ = 160547184. Its totient is φ = 29730880.

The previous prime is 81760013. The next prime is 81760037. The reversal of 81760030 is 3006718.

It is a junction number, because it is equal to n+sod(n) for n = 81759977 and 81760004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81760037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 371527 + ... + 371746.

It is an arithmetic number, because the mean of its divisors is an integer number (10034199).

Almost surely, 2^81760030 is an apocalyptic number.

81760030 is a deficient number, since it is larger than the sum of its proper divisors (78787154).

81760030 is a wasteful number, since it uses less digits than its factorization.

81760030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743291.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 81760030 is about 9042.1253032680. The cubic root of 81760030 is about 434.0239356220.

Adding to 81760030 its reverse (3006718), we get a palindrome (84766748).

The spelling of 81760030 in words is "eighty-one million, seven hundred sixty thousand, thirty".