1329804 has 48 divisors (see below), whose sum is σ = 3942400. Its totient is φ = 379728.

The previous prime is 1329799. The next prime is 1329847. The reversal of 1329804 is 4089231.

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

It is a congruent number.

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, 124 + ... + 1635.

2^1329804 is an apocalyptic number.

1329804 is a gapful number since it is divisible by the number (14) 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 1329804, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1971200).

1329804 is an abundant number, since it is smaller than the sum of its proper divisors (2612596).

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

1329804 is a wasteful number, since it uses less digits than its factorization.

1329804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1779 (or 1771 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 1329804 is about 1153.1712795591. The cubic root of 1329804 is about 109.9670424680.

The spelling of 1329804 in words is "one million, three hundred twenty-nine thousand, eight hundred four".