82118844 has 18 divisors (see below), whose sum is σ = 207578280. Its totient is φ = 27372936.

The previous prime is 82118833. The next prime is 82118849. The reversal of 82118844 is 44881128.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 2281079 = 82118844 / (8 + 2 + 1 + 1 + 8 + 8 + 4 + 4).

It is a junction number, because it is equal to n+sod(n) for n = 82118799 and 82118808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82118849) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1140504 + ... + 1140575.

Almost surely, 2^82118844 is an apocalyptic number.

It is an amenable number.

82118844 is an abundant number, since it is smaller than the sum of its proper divisors (125459436).

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

82118844 is a wasteful number, since it uses less digits than its factorization.

82118844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2281089 (or 2281084 counting only the distinct ones).

The product of its digits is 16384, while the sum is 36.

The square root of 82118844 is about 9061.9448243741. The cubic root of 82118844 is about 434.6579316351.

The spelling of 82118844 in words is "eighty-two million, one hundred eighteen thousand, eight hundred forty-four".