81034704 has 120 divisors (see below), whose sum is σ = 242573760. Its totient is φ = 25191936.

The previous prime is 81034703. The next prime is 81034711. The reversal of 81034704 is 40743018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81034703) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 142132 + ... + 142700.

It is an arithmetic number, because the mean of its divisors is an integer number (2021448).

Almost surely, 2^81034704 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 81034704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121286880).

81034704 is an abundant number, since it is smaller than the sum of its proper divisors (161539056).

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

81034704 is a wasteful number, since it uses less digits than its factorization.

81034704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 649 (or 640 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 81034704 is about 9001.9277935340. The cubic root of 81034704 is about 432.7366546510.

The spelling of 81034704 in words is "eighty-one million, thirty-four thousand, seven hundred four".