1604442 has 16 divisors (see below), whose sum is σ = 3667392. Its totient is φ = 458400.

The previous prime is 1604441. The next prime is 1604461. The reversal of 1604442 is 2444061.

It is a Harshad number since it is a multiple of its sum of digits (21).

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 7 ways as a sum of consecutive naturals, for example, 19059 + ... + 19142.

It is an arithmetic number, because the mean of its divisors is an integer number (229212).

2^1604442 is an apocalyptic number.

1604442 is an abundant number, since it is smaller than the sum of its proper divisors (2062950).

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

1604442 is a wasteful number, since it uses less digits than its factorization.

1604442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38213.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 1604442 is about 1266.6657017540. The cubic root of 1604442 is about 117.0688469080.

The spelling of 1604442 in words is "one million, six hundred four thousand, four hundred forty-two".