81030068 has 48 divisors (see below), whose sum is σ = 168161280. Its totient is φ = 33444576.

The previous prime is 81030023. The next prime is 81030097. The reversal of 81030068 is 86003018.

It is a congruent number.

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, 87713 + ... + 88631.

It is an arithmetic number, because the mean of its divisors is an integer number (3503360).

Almost surely, 2^81030068 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 81030068, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84080640).

81030068 is an abundant number, since it is smaller than the sum of its proper divisors (87131212).

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

81030068 is a wasteful number, since it uses less digits than its factorization.

81030068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1044 (or 1042 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 81030068 is about 9001.6702894518. The cubic root of 81030068 is about 432.7284021975.

The spelling of 81030068 in words is "eighty-one million, thirty thousand, sixty-eight".