81846436 has 12 divisors (see below), whose sum is σ = 163692928. Its totient is φ = 35077032.

The previous prime is 81846421. The next prime is 81846451. The reversal of 81846436 is 63464818.

It is an interprime number because it is at equal distance from previous prime (81846421) and next prime (81846451).

81846436 is an admirable number.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

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, 1461516 + ... + 1461571.

Almost surely, 2^81846436 is an apocalyptic number.

It is an amenable number.

81846436 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

81846436 is a wasteful number, since it uses less digits than its factorization.

81846436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2923098 (or 2923096 counting only the distinct ones).

The product of its digits is 110592, while the sum is 40.

The square root of 81846436 is about 9046.9020111859. The cubic root of 81846436 is about 434.1767774969.

The spelling of 81846436 in words is "eighty-one million, eight hundred forty-six thousand, four hundred thirty-six".