81884526 has 8 divisors (see below), whose sum is σ = 163769064. Its totient is φ = 27294840.

The previous prime is 81884521. The next prime is 81884557. The reversal of 81884526 is 62548818.

It is a sphenic number, since it is the product of 3 distinct primes.

81884526 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81884521) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6823705 + ... + 6823716.

It is an arithmetic number, because the mean of its divisors is an integer number (20471133).

Almost surely, 2^81884526 is an apocalyptic number.

81884526 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

81884526 is a wasteful number, since it uses less digits than its factorization.

81884526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13647426.

The product of its digits is 122880, while the sum is 42.

The square root of 81884526 is about 9049.0069068379. The cubic root of 81884526 is about 434.2441199879.

The spelling of 81884526 in words is "eighty-one million, eight hundred eighty-four thousand, five hundred twenty-six".