81468884 has 24 divisors (see below), whose sum is σ = 171514560. Its totient is φ = 33077376.

The previous prime is 81468883. The next prime is 81468887. The reversal of 81468884 is 48886418.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81468883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76037 + ... + 77100.

It is an arithmetic number, because the mean of its divisors is an integer number (7146440).

Almost surely, 2^81468884 is an apocalyptic number.

It is an amenable number.

81468884 is an abundant number, since it is smaller than the sum of its proper divisors (90045676).

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

81468884 is a wasteful number, since it uses less digits than its factorization.

81468884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153167 (or 153165 counting only the distinct ones).

The product of its digits is 393216, while the sum is 47.

The square root of 81468884 is about 9026.0115222616. The cubic root of 81468884 is about 433.5081390732.

The spelling of 81468884 in words is "eighty-one million, four hundred sixty-eight thousand, eight hundred eighty-four".