81852608 has 56 divisors (see below), whose sum is σ = 173248320. Its totient is φ = 38257920.

The previous prime is 81852601. The next prime is 81852649. The reversal of 81852608 is 80625818.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81852601) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 100523 + ... + 101333.

It is an arithmetic number, because the mean of its divisors is an integer number (3093720).

Almost surely, 2^81852608 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 81852608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86624160).

81852608 is an abundant number, since it is smaller than the sum of its proper divisors (91395712).

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

81852608 is a wasteful number, since it uses less digits than its factorization.

81852608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 925 (or 915 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 38.

The square root of 81852608 is about 9047.2431159995. The cubic root of 81852608 is about 434.1876909092.

The spelling of 81852608 in words is "eighty-one million, eight hundred fifty-two thousand, six hundred eight".