81862234 has 8 divisors (see below), whose sum is σ = 123607008. Its totient is φ = 40659900.

The previous prime is 81862229. The next prime is 81862247. The reversal of 81862234 is 43226818.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 81862234.

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 3 ways as a sum of consecutive naturals, for example, 135232 + ... + 135835.

It is an arithmetic number, because the mean of its divisors is an integer number (15450876).

Almost surely, 2^81862234 is an apocalyptic number.

81862234 is a deficient number, since it is larger than the sum of its proper divisors (41744774).

81862234 is a wasteful number, since it uses less digits than its factorization.

81862234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271220.

The product of its digits is 18432, while the sum is 34.

The square root of 81862234 is about 9047.7750856219. The cubic root of 81862234 is about 434.2047106352.

The spelling of 81862234 in words is "eighty-one million, eight hundred sixty-two thousand, two hundred thirty-four".