81479368 has 32 divisors (see below), whose sum is σ = 162712800. Its totient is φ = 38117632.

The previous prime is 81479329. The next prime is 81479371. The reversal of 81479368 is 86397418.

It is a happy number.

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, 22671 + ... + 26017.

It is an arithmetic number, because the mean of its divisors is an integer number (5084775).

Almost surely, 2^81479368 is an apocalyptic number.

It is an amenable number.

81479368 is a deficient number, since it is larger than the sum of its proper divisors (81233432).

81479368 is a wasteful number, since it uses less digits than its factorization.

81479368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3549 (or 3545 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 81479368 is about 9026.5922695112. The cubic root of 81479368 is about 433.5267339206.

The spelling of 81479368 in words is "eighty-one million, four hundred seventy-nine thousand, three hundred sixty-eight".