1660244 has 6 divisors (see below), whose sum is σ = 2905434. Its totient is φ = 830120.

The previous prime is 1660231. The next prime is 1660247. The reversal of 1660244 is 4420661.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1592644 + 67600 = 1262^2 + 260^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1660247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207527 + ... + 207534.

It is an arithmetic number, because the mean of its divisors is an integer number (484239).

2^1660244 is an apocalyptic number.

It is an amenable number.

1660244 is a deficient number, since it is larger than the sum of its proper divisors (1245190).

1660244 is a wasteful number, since it uses less digits than its factorization.

1660244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 415065 (or 415063 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 1660244 is about 1288.5045595573. The cubic root of 1660244 is about 118.4106158305.

The spelling of 1660244 in words is "one million, six hundred sixty thousand, two hundred forty-four".