8161604 has 12 divisors (see below), whose sum is σ = 15581328. Its totient is φ = 3709800.

The previous prime is 8161591. The next prime is 8161607. The reversal of 8161604 is 4061618.

It is a super-2 number, since 2×8161604² = 133223559705632, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (8161607) 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, 92702 + ... + 92789.

It is an arithmetic number, because the mean of its divisors is an integer number (1298444).

Almost surely, 2^8161604 is an apocalyptic number.

It is an amenable number.

8161604 is a deficient number, since it is larger than the sum of its proper divisors (7419724).

8161604 is a wasteful number, since it uses less digits than its factorization.

8161604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185506 (or 185504 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 8161604 is about 2856.8521137784. The cubic root of 8161604 is about 201.3377324107.

The spelling of 8161604 in words is "eight million, one hundred sixty-one thousand, six hundred four".