81832478 has 16 divisors (see below), whose sum is σ = 151075680. Its totient is φ = 32373216.

The previous prime is 81832447. The next prime is 81832481. The reversal of 81832478 is 87423818.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 224633 + ... + 224996.

It is an arithmetic number, because the mean of its divisors is an integer number (9442230).

Almost surely, 2^81832478 is an apocalyptic number.

81832478 is a deficient number, since it is larger than the sum of its proper divisors (69243202).

81832478 is a wasteful number, since it uses less digits than its factorization.

81832478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449651.

The product of its digits is 86016, while the sum is 41.

The square root of 81832478 is about 9046.1305539993. The cubic root of 81832478 is about 434.1520947524.

The spelling of 81832478 in words is "eighty-one million, eight hundred thirty-two thousand, four hundred seventy-eight".