1604340 has 48 divisors (see below), whose sum is σ = 4992960. Its totient is φ = 427680.

The previous prime is 1604333. The next prime is 1604347. The reversal of 1604340 is 434061.

It is an interprime number because it is at equal distance from previous prime (1604333) and next prime (1604347).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1604347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 946 + ... + 2025.

It is an arithmetic number, because the mean of its divisors is an integer number (104020).

2^1604340 is an apocalyptic number.

1604340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1604340 is an abundant number, since it is smaller than the sum of its proper divisors (3388620).

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

1604340 is a wasteful number, since it uses less digits than its factorization.

1604340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2989 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1604340 is about 1266.6254379255. The cubic root of 1604340 is about 117.0663660298.

The spelling of 1604340 in words is "one million, six hundred four thousand, three hundred forty".