81894482 has 8 divisors (see below), whose sum is σ = 122946636. Its totient is φ = 40912272.

The previous prime is 81894443. The next prime is 81894493. The reversal of 81894482 is 28449818.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 77810041 + 4084441 = 8821^2 + 2021^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14453 + ... + 19304.

Almost surely, 2^81894482 is an apocalyptic number.

81894482 is a deficient number, since it is larger than the sum of its proper divisors (41052154).

81894482 is a wasteful number, since it uses less digits than its factorization.

81894482 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34972.

The product of its digits is 147456, while the sum is 44.

The square root of 81894482 is about 9049.5570057324. The cubic root of 81894482 is about 434.2617185887.

The spelling of 81894482 in words is "eighty-one million, eight hundred ninety-four thousand, four hundred eighty-two".