81326076 has 48 divisors (see below), whose sum is σ = 206976000. Its totient is φ = 24702912.

The previous prime is 81326059. The next prime is 81326107. The reversal of 81326076 is 67062318.

It is a super-2 number, since 2×81326076² = 13227861275115552, which contains 22 as substring.

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, 9025 + ... + 15623.

It is an arithmetic number, because the mean of its divisors is an integer number (4312000).

Almost surely, 2^81326076 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 81326076, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103488000).

81326076 is an abundant number, since it is smaller than the sum of its proper divisors (125649924).

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

81326076 is a wasteful number, since it uses less digits than its factorization.

81326076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6698 (or 6696 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 81326076 is about 9018.0971385321. The cubic root of 81326076 is about 433.2546900018.

The spelling of 81326076 in words is "eighty-one million, three hundred twenty-six thousand, seventy-six".