81264984 has 16 divisors (see below), whose sum is σ = 203162520. Its totient is φ = 27088320.

The previous prime is 81264983. The next prime is 81265013. The reversal of 81264984 is 48946218.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (81264983) 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, 1692997 + ... + 1693044.

Almost surely, 2^81264984 is an apocalyptic number.

It is an amenable number.

81264984 is an abundant number, since it is smaller than the sum of its proper divisors (121897536).

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

81264984 is a wasteful number, since it uses less digits than its factorization.

81264984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386050 (or 3386046 counting only the distinct ones).

The product of its digits is 110592, while the sum is 42.

The square root of 81264984 is about 9014.7093131171. The cubic root of 81264984 is about 433.1461761144.

The spelling of 81264984 in words is "eighty-one million, two hundred sixty-four thousand, nine hundred eighty-four".