1660144 has 40 divisors (see below), whose sum is σ = 3491840. Its totient is φ = 762048.

The previous prime is 1660133. The next prime is 1660177. The reversal of 1660144 is 4410661.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13009 + ... + 13135.

It is an arithmetic number, because the mean of its divisors is an integer number (87296).

2^1660144 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 1660144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1745920).

1660144 is an abundant number, since it is smaller than the sum of its proper divisors (1831696).

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

1660144 is a wasteful number, since it uses less digits than its factorization.

1660144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 191 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1660144 is about 1288.4657542985. The cubic root of 1660144 is about 118.4082384090.

The spelling of 1660144 in words is "one million, six hundred sixty thousand, one hundred forty-four".