81038468 has 48 divisors (see below), whose sum is σ = 168478464. Its totient is φ = 33384960.

The previous prime is 81038467. The next prime is 81038471. The reversal of 81038468 is 86483018.

It is not an unprimeable number, because it can be changed into a prime (81038467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83321 + ... + 84287.

It is an arithmetic number, because the mean of its divisors is an integer number (3509968).

Almost surely, 2^81038468 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 81038468, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84239232).

81038468 is an abundant number, since it is smaller than the sum of its proper divisors (87439996).

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

81038468 is a wasteful number, since it uses less digits than its factorization.

81038468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092 (or 1090 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 81038468 is about 9002.1368574356. The cubic root of 81038468 is about 432.7433546428.

The spelling of 81038468 in words is "eighty-one million, thirty-eight thousand, four hundred sixty-eight".