81488106 has 96 divisors (see below), whose sum is σ = 221719680. Its totient is φ = 21897216.

The previous prime is 81488087. The next prime is 81488111. The reversal of 81488106 is 60188418.

It is a super-2 number, since 2×81488106² = 13280622838934472, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 57130 + ... + 58538.

It is an arithmetic number, because the mean of its divisors is an integer number (2309580).

Almost surely, 2^81488106 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 81488106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110859840).

81488106 is an abundant number, since it is smaller than the sum of its proper divisors (140231574).

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

81488106 is a wasteful number, since it uses less digits than its factorization.

81488106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450 (or 1438 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 36.

The square root of 81488106 is about 9027.0762708642. The cubic root of 81488106 is about 433.5422307729.

The spelling of 81488106 in words is "eighty-one million, four hundred eighty-eight thousand, one hundred six".