1439631668 has 12 divisors (see below), whose sum is σ = 2587446372. Its totient is φ = 700361280.

The previous prime is 1439631637. The next prime is 1439631671. The reversal of 1439631668 is 8661369341.

It can be written as a sum of positive squares in 2 ways, for example, as 1202841124 + 236790544 = 34682^2 + 15388^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4863473 + ... + 4863768.

It is an arithmetic number, because the mean of its divisors is an integer number (215620531).

Almost surely, 2^1439631668 is an apocalyptic number.

It is an amenable number.

1439631668 is a deficient number, since it is larger than the sum of its proper divisors (1147814704).

1439631668 is a wasteful number, since it uses less digits than its factorization.

1439631668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9727282 (or 9727280 counting only the distinct ones).

The product of its digits is 559872, while the sum is 47.

The square root of 1439631668 is about 37942.4784114059. The cubic root of 1439631668 is about 1129.1469448684.

It can be divided in two parts, 14396 and 31668, that added together give a palindrome (46064).

The spelling of 1439631668 in words is "one billion, four hundred thirty-nine million, six hundred thirty-one thousand, six hundred sixty-eight".