81046332 has 72 divisors (see below), whose sum is σ = 214032000. Its totient is φ = 26815536.

The previous prime is 81046291. The next prime is 81046333. The reversal of 81046332 is 23364018.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 81046296 and 81046305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81046333) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 193219 + ... + 193637.

Almost surely, 2^81046332 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 81046332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107016000).

81046332 is an abundant number, since it is smaller than the sum of its proper divisors (132985668).

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

81046332 is a wasteful number, since it uses less digits than its factorization.

81046332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637 (or 623 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 81046332 is about 9002.5736320232. The cubic root of 81046332 is about 432.7573520433.

The spelling of 81046332 in words is "eighty-one million, forty-six thousand, three hundred thirty-two".