1604816 has 20 divisors (see below), whose sum is σ = 3273600. Its totient is φ = 760032.

The previous prime is 1604809. The next prime is 1604821. The reversal of 1604816 is 6184061.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2336 + ... + 2943.

It is an arithmetic number, because the mean of its divisors is an integer number (163680).

2^1604816 is an apocalyptic number.

1604816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1604816 is an abundant number, since it is smaller than the sum of its proper divisors (1668784).

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

1604816 is a wasteful number, since it uses less digits than its factorization.

1604816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306 (or 5300 counting only the distinct ones).

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

The square root of 1604816 is about 1266.8133248431. The cubic root of 1604816 is about 117.0779425618.

Adding to 1604816 its reverse (6184061), we get a palindrome (7788877).

The spelling of 1604816 in words is "one million, six hundred four thousand, eight hundred sixteen".