1604880 has 80 divisors (see below), whose sum is σ = 5535360. Its totient is φ = 427392.

The previous prime is 1604857. The next prime is 1604923. The reversal of 1604880 is 884061.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a nialpdrome in base 6.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1789 + ... + 2531.

It is an arithmetic number, because the mean of its divisors is an integer number (69192).

2^1604880 is an apocalyptic number.

1604880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1604880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2767680).

1604880 is an abundant number, since it is smaller than the sum of its proper divisors (3930480).

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

1604880 is a wasteful number, since it uses less digits than its factorization.

1604880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765 (or 753 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 27.

The square root of 1604880 is about 1266.8385848244. The cubic root of 1604880 is about 117.0794988957.

The spelling of 1604880 in words is "one million, six hundred four thousand, eight hundred eighty".