81327376 has 40 divisors (see below), whose sum is σ = 172113984. Its totient is φ = 37000320.

The previous prime is 81327361. The next prime is 81327377. The reversal of 81327376 is 67372318.

It is a super-2 number, since 2×81327376² = 13228284174090752, which contains 22 as substring.

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (81327377) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12015 + ... + 17521.

Almost surely, 2^81327376 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 81327376, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86056992).

81327376 is an abundant number, since it is smaller than the sum of its proper divisors (90786608).

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

81327376 is a wasteful number, since it uses less digits than its factorization.

81327376 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5599 (or 5593 counting only the distinct ones).

The product of its digits is 42336, while the sum is 37.

The square root of 81327376 is about 9018.1692155337. The cubic root of 81327376 is about 433.2569985197.

The spelling of 81327376 in words is "eighty-one million, three hundred twenty-seven thousand, three hundred seventy-six".