1664960 has 84 divisors (see below), whose sum is σ = 4459224. Its totient is φ = 591360.

The previous prime is 1664959. The next prime is 1664987. The reversal of 1664960 is 694661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 38699 + ... + 38741.

It is an arithmetic number, because the mean of its divisors is an integer number (53086).

2^1664960 is an apocalyptic number.

1664960 is a gapful number since it is divisible by the number (10) 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 1664960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2229612).

1664960 is an abundant number, since it is smaller than the sum of its proper divisors (2794264).

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

1664960 is a wasteful number, since it uses less digits than its factorization.

1664960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 61 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 1664960 is about 1290.3332902781. Note that the first 3 decimals coincide. The cubic root of 1664960 is about 118.5226267866.

Subtracting from 1664960 its reverse (694661), we obtain a cube (970299 = 99³).

The spelling of 1664960 in words is "one million, six hundred sixty-four thousand, nine hundred sixty".