81829602 has 80 divisors (see below), whose sum is σ = 198947232. Its totient is φ = 25038720.

The previous prime is 81829589. The next prime is 81829603. The reversal of 81829602 is 20692818.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (81829603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 118077 + ... + 118767.

Almost surely, 2^81829602 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81829602, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99473616).

81829602 is an abundant number, since it is smaller than the sum of its proper divisors (117117630).

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

81829602 is a wasteful number, since it uses less digits than its factorization.

81829602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 756 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 81829602 is about 9045.9715896083. The cubic root of 81829602 is about 434.1470086054.

The spelling of 81829602 in words is "eighty-one million, eight hundred twenty-nine thousand, six hundred two".