8181604 has 12 divisors (see below), whose sum is σ = 14350000. Its totient is φ = 4081608.

The previous prime is 8181601. The next prime is 8181611. The reversal of 8181604 is 4061818.

It is not an unprimeable number, because it can be changed into a prime (8181601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54 + ... + 4045.

Almost surely, 2^8181604 is an apocalyptic number.

It is an amenable number.

8181604 is a deficient number, since it is larger than the sum of its proper divisors (6168396).

8181604 is a wasteful number, since it uses less digits than its factorization.

8181604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4602 (or 4600 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 28.

The square root of 8181604 is about 2860.3503281941. The cubic root of 8181604 is about 201.5020575415.

The spelling of 8181604 in words is "eight million, one hundred eighty-one thousand, six hundred four".