1604916 has 36 divisors (see below), whose sum is σ = 4104100. Its totient is φ = 528768.

The previous prime is 1604857. The next prime is 1604923. The reversal of 1604916 is 6194061.

It can be written as a sum of positive squares in 2 ways, for example, as 1313316 + 291600 = 1146^2 + 540^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a nialpdrome in base 6.

It is a self number, because there is not a number n which added to its sum of digits gives 1604916.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3720 + ... + 4128.

2^1604916 is an apocalyptic number.

It is an amenable number.

1604916 is an abundant number, since it is smaller than the sum of its proper divisors (2499184).

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

1604916 is a wasteful number, since it uses less digits than its factorization.

1604916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528 (or 523 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 1604916 is about 1266.8527933426. The cubic root of 1604916 is about 117.0803743154.

Adding to 1604916 its reverse (6194061), we get a palindrome (7798977).

The spelling of 1604916 in words is "one million, six hundred four thousand, nine hundred sixteen".