1440666628 has 6 divisors (see below), whose sum is σ = 2521166606. Its totient is φ = 720333312.

The previous prime is 1440666613. The next prime is 1440666637. The reversal of 1440666628 is 8266660441.

It can be written as a sum of positive squares in only one way, i.e., 1373295364 + 67371264 = 37058^2 + 8208^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180083325 + ... + 180083332.

Almost surely, 2^1440666628 is an apocalyptic number.

It is an amenable number.

1440666628 is a deficient number, since it is larger than the sum of its proper divisors (1080499978).

1440666628 is a wasteful number, since it uses less digits than its factorization.

1440666628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360166661 (or 360166659 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 43.

The square root of 1440666628 is about 37956.1145008285. The cubic root of 1440666628 is about 1129.4174635982.

The spelling of 1440666628 in words is "one billion, four hundred forty million, six hundred sixty-six thousand, six hundred twenty-eight".