81062760 has 64 divisors (see below), whose sum is σ = 244284480. Its totient is φ = 21519360.

The previous prime is 81062753. The next prime is 81062789. The reversal of 81062760 is 6726018.

It is a happy number.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27519 + ... + 30321.

It is an arithmetic number, because the mean of its divisors is an integer number (3816945).

Almost surely, 2^81062760 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81062760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (122142240).

81062760 is an abundant number, since it is smaller than the sum of its proper divisors (163221720).

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

81062760 is a wasteful number, since it uses less digits than its factorization.

81062760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3058 (or 3054 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 81062760 is about 9003.4859915479. The cubic root of 81062760 is about 432.7865898768.

Adding to 81062760 its reverse (6726018), we get a palindrome (87788778).

The spelling of 81062760 in words is "eighty-one million, sixty-two thousand, seven hundred sixty".