81952108 has 36 divisors (see below), whose sum is σ = 167484240. Its totient is φ = 34984992.

The previous prime is 81952069. The next prime is 81952139. The reversal of 81952108 is 80125918.

It is a super-2 number, since 2×81952108² = 13432296011287328, which contains 22 as substring.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 61473 + ... + 62791.

It is an arithmetic number, because the mean of its divisors is an integer number (4652340).

Almost surely, 2^81952108 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 81952108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83742120).

81952108 is an abundant number, since it is smaller than the sum of its proper divisors (85532132).

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

81952108 is a wasteful number, since it uses less digits than its factorization.

81952108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1654 (or 1645 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 34.

The square root of 81952108 is about 9052.7403585876. The cubic root of 81952108 is about 434.3635524682.

The spelling of 81952108 in words is "eighty-one million, nine hundred fifty-two thousand, one hundred eight".