8181204 has 24 divisors (see below), whose sum is σ = 19145280. Its totient is φ = 2719104.

The previous prime is 8181203. The next prime is 8181211. The reversal of 8181204 is 4021818.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8181203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4492 + ... + 6044.

It is an arithmetic number, because the mean of its divisors is an integer number (797720).

Almost surely, 2^8181204 is an apocalyptic number.

It is an amenable number.

8181204 is an abundant number, since it is smaller than the sum of its proper divisors (10964076).

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

8181204 is a wasteful number, since it uses less digits than its factorization.

8181204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1999 (or 1997 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 8181204 is about 2860.2804058344. The cubic root of 8181204 is about 201.4987736648.

It can be divided in two parts, 8181 and 204, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 8181204 in words is "eight million, one hundred eighty-one thousand, two hundred four".