1604448 has 60 divisors (see below), whose sum is σ = 4726260. Its totient is φ = 533952.

The previous prime is 1604441. The next prime is 1604461. The reversal of 1604448 is 8444061.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604441) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2283 + ... + 2901.

It is an arithmetic number, because the mean of its divisors is an integer number (78771).

2^1604448 is an apocalyptic number.

1604448 is a gapful number since it is divisible by the number (18) 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 1604448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2363130).

1604448 is an abundant number, since it is smaller than the sum of its proper divisors (3121812).

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

1604448 is an equidigital number, since it uses as much as digits as its factorization.

1604448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641 (or 624 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1604448 is about 1266.6680701747. The cubic root of 1604448 is about 117.0689928387.

The spelling of 1604448 in words is "one million, six hundred four thousand, four hundred forty-eight".