81037104 has 80 divisors (see below), whose sum is σ = 217581312. Its totient is φ = 25968384.

The previous prime is 81037091. The next prime is 81037153. The reversal of 81037104 is 40173018.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182707 + ... + 183149.

Almost surely, 2^81037104 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 81037104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108790656).

81037104 is an abundant number, since it is smaller than the sum of its proper divisors (136544208).

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

81037104 is a wasteful number, since it uses less digits than its factorization.

81037104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594 (or 588 counting only the distinct ones).

The product of its (nonzero) digits is 672, while the sum is 24.

The square root of 81037104 is about 9002.0610973265. The cubic root of 81037104 is about 432.7409267208.

The spelling of 81037104 in words is "eighty-one million, thirty-seven thousand, one hundred four".