1440666 has 20 divisors (see below), whose sum is σ = 3228522. Its totient is φ = 480168.

The previous prime is 1440641. The next prime is 1440679. The reversal of 1440666 is 6660441.

It can be written as a sum of positive squares in only one way, i.e., 1390041 + 50625 = 1179^2 + 225^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 4285 + ... + 4608.

2^1440666 is an apocalyptic number.

1440666 is an abundant number, since it is smaller than the sum of its proper divisors (1787856).

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

1440666 is an equidigital number, since it uses as much as digits as its factorization.

1440666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8907 (or 8898 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The square root of 1440666 is about 1200.2774679215. The cubic root of 1440666 is about 112.9417299490.

The spelling of 1440666 in words is "one million, four hundred forty thousand, six hundred sixty-six".