811604 has 24 divisors (see below), whose sum is σ = 1528800. Its totient is φ = 375840.

The previous prime is 811583. The next prime is 811607. The reversal of 811604 is 406118.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (811607) 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, 4394 + ... + 4574.

It is an arithmetic number, because the mean of its divisors is an integer number (63700).

2⁸¹¹⁶⁰⁴ is an apocalyptic number.

It is an amenable number.

811604 is a deficient number, since it is larger than the sum of its proper divisors (717196).

811604 is a wasteful number, since it uses less digits than its factorization.

811604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 261 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 20.

The square root of 811604 is about 900.8906703924. The cubic root of 811604 is about 93.2784654836.

The spelling of 811604 in words is "eight hundred eleven thousand, six hundred four".