81894034 has 8 divisors (see below), whose sum is σ = 123213168. Its totient is φ = 40822980.

The previous prime is 81894031. The next prime is 81894041. The reversal of 81894034 is 43049818.

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

It is a junction number, because it is equal to n+sod(n) for n = 81893984 and 81894002.

It is not an unprimeable number, because it can be changed into a prime (81894031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61192 + ... + 62515.

It is an arithmetic number, because the mean of its divisors is an integer number (15401646).

Almost surely, 2^81894034 is an apocalyptic number.

81894034 is a deficient number, since it is larger than the sum of its proper divisors (41319134).

81894034 is a wasteful number, since it uses less digits than its factorization.

81894034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124040.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 81894034 is about 9049.5322531057. The cubic root of 81894034 is about 434.2609267177.

The spelling of 81894034 in words is "eighty-one million, eight hundred ninety-four thousand, thirty-four".