81844104 has 16 divisors (see below), whose sum is σ = 204610320. Its totient is φ = 27281360.

The previous prime is 81844099. The next prime is 81844121. The reversal of 81844104 is 40144818.

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, 1705062 + ... + 1705109.

It is an arithmetic number, because the mean of its divisors is an integer number (12788145).

Almost surely, 2^81844104 is an apocalyptic number.

It is an amenable number.

81844104 is an abundant number, since it is smaller than the sum of its proper divisors (122766216).

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

81844104 is a wasteful number, since it uses less digits than its factorization.

81844104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3410180 (or 3410176 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 30.

The square root of 81844104 is about 9046.7731263694. The cubic root of 81844104 is about 434.1726538807.

The spelling of 81844104 in words is "eighty-one million, eight hundred forty-four thousand, one hundred four".