81733036 has 48 divisors (see below), whose sum is σ = 179182080. Its totient is φ = 31691520.

The previous prime is 81733033. The next prime is 81733051. The reversal of 81733036 is 63033718.

It is a junction number, because it is equal to n+sod(n) for n = 81732989 and 81733007.

It is not an unprimeable number, because it can be changed into a prime (81733031) 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, 80500 + ... + 81508.

It is an arithmetic number, because the mean of its divisors is an integer number (3732960).

Almost surely, 2^81733036 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 81733036, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89591040).

81733036 is an abundant number, since it is smaller than the sum of its proper divisors (97449044).

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

81733036 is a wasteful number, since it uses less digits than its factorization.

81733036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1294 (or 1292 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 81733036 is about 9040.6324999969. The cubic root of 81733036 is about 433.9761643914.

The spelling of 81733036 in words is "eighty-one million, seven hundred thirty-three thousand, thirty-six".