1604620 has 12 divisors (see below), whose sum is σ = 3369744. Its totient is φ = 641840.

The previous prime is 1604611. The next prime is 1604621. The reversal of 1604620 is 264061.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (1604621) 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, 40096 + ... + 40135.

It is an arithmetic number, because the mean of its divisors is an integer number (280812).

2^1604620 is an apocalyptic number.

1604620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604620 is an abundant number, since it is smaller than the sum of its proper divisors (1765124).

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

1604620 is a wasteful number, since it uses less digits than its factorization.

1604620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80240 (or 80238 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1604620 is about 1266.7359630168. The cubic root of 1604620 is about 117.0731760318.

Adding to 1604620 its reverse (264061), we get a palindrome (1868681).

The spelling of 1604620 in words is "one million, six hundred four thousand, six hundred twenty".