81883834 has 16 divisors (see below), whose sum is σ = 129185280. Its totient is φ = 38872080.

The previous prime is 81883793. The next prime is 81883843. The reversal of 81883834 is 43838818.

It is a happy 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, 9174 + ... + 15745.

It is an arithmetic number, because the mean of its divisors is an integer number (8074080).

Almost surely, 2^81883834 is an apocalyptic number.

81883834 is a deficient number, since it is larger than the sum of its proper divisors (47301446).

81883834 is a wasteful number, since it uses less digits than its factorization.

81883834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25005.

The product of its digits is 147456, while the sum is 43.

The square root of 81883834 is about 9048.9686705171. The cubic root of 81883834 is about 434.2428967296.

The spelling of 81883834 in words is "eighty-one million, eight hundred eighty-three thousand, eight hundred thirty-four".