81485328 has 40 divisors (see below), whose sum is σ = 210833728. Its totient is φ = 27119232.

The previous prime is 81485311. The next prime is 81485347. The reversal of 81485328 is 82358418.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50226 + ... + 51822.

Almost surely, 2^81485328 is an apocalyptic number.

It is an amenable number.

81485328 is an abundant number, since it is smaller than the sum of its proper divisors (129348400).

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

81485328 is a wasteful number, since it uses less digits than its factorization.

81485328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2671 (or 2665 counting only the distinct ones).

The product of its digits is 61440, while the sum is 39.

The square root of 81485328 is about 9026.9223991347. The cubic root of 81485328 is about 433.5373041070.

The spelling of 81485328 in words is "eighty-one million, four hundred eighty-five thousand, three hundred twenty-eight".