1320939386 has 32 divisors (see below), whose sum is σ = 2210801040. Its totient is φ = 587736576.

The previous prime is 1320939247. The next prime is 1320939397. The reversal of 1320939386 is 6839390231.

It can be written as a sum of positive squares in 8 ways, for example, as 138886225 + 1182053161 = 11785^2 + 34381^2 .

It is a super-3 number, since 3×1320939386³ (a number of 28 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 826340 + ... + 827936.

Almost surely, 2^1320939386 is an apocalyptic number.

1320939386 is a deficient number, since it is larger than the sum of its proper divisors (889861654).

1320939386 is a wasteful number, since it uses less digits than its factorization.

1320939386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2738.

The product of its (nonzero) digits is 209952, while the sum is 44.

The square root of 1320939386 is about 36344.7298242813. The cubic root of 1320939386 is about 1097.2214685036.

The spelling of 1320939386 in words is "one billion, three hundred twenty million, nine hundred thirty-nine thousand, three hundred eighty-six".