1660928 has 24 divisors (see below), whose sum is σ = 3325140. Its totient is φ = 829440.

The previous prime is 1660921. The next prime is 1660943. The reversal of 1660928 is 8290661.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 1660894 and 1660903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1643 + ... + 2453.

2^1660928 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 1660928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1662570).

1660928 is an abundant number, since it is smaller than the sum of its proper divisors (1664212).

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

1660928 is an frugal number, since it uses more digits than its factorization.

1660928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833 (or 813 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 1660928 is about 1288.7699561985. The cubic root of 1660928 is about 118.4268748344.

The spelling of 1660928 in words is "one million, six hundred sixty thousand, nine hundred twenty-eight".