1671328 has 24 divisors (see below), whose sum is σ = 3405780. Its totient is φ = 806400.

The previous prime is 1671311. The next prime is 1671337. The reversal of 1671328 is 8231761.

It can be written as a sum of positive squares in 2 ways, for example, as 1607824 + 63504 = 1268^2 + 252^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1671296 and 1671305.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28 + ... + 1828.

2^1671328 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1671328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1702890).

1671328 is an abundant number, since it is smaller than the sum of its proper divisors (1734452).

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

1671328 is a wasteful number, since it uses less digits than its factorization.

1671328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1840 (or 1832 counting only the distinct ones).

The product of its digits is 2016, while the sum is 28.

The square root of 1671328 is about 1292.7985148506. The cubic root of 1671328 is about 118.6735396993.

The spelling of 1671328 in words is "one million, six hundred seventy-one thousand, three hundred twenty-eight".