1604636 has 12 divisors (see below), whose sum is σ = 3063480. Its totient is φ = 729360.

The previous prime is 1604621. The next prime is 1604651. The reversal of 1604636 is 6364061.

It is an interprime number because it is at equal distance from previous prime (1604621) and next prime (1604651).

It is a d-powerful number, because it can be written as 1 + 6³ + 0 + 4⁵ + 6⁴ + 3¹³ + 6⁵ .

It is a zygodrome in base 2.

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, 18191 + ... + 18278.

It is an arithmetic number, because the mean of its divisors is an integer number (255290).

2^1604636 is an apocalyptic number.

It is an amenable number.

1604636 is a deficient number, since it is larger than the sum of its proper divisors (1458844).

1604636 is a wasteful number, since it uses less digits than its factorization.

1604636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36484 (or 36482 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 1604636 is about 1266.7422784450. The cubic root of 1604636 is about 117.0735651508.

Adding to 1604636 its reverse (6364061), we get a palindrome (7968697).

The spelling of 1604636 in words is "one million, six hundred four thousand, six hundred thirty-six".