1339860639 has 32 divisors (see below), whose sum is σ = 2095027200. Its totient is φ = 754185600.

The previous prime is 1339860629. The next prime is 1339860649. The reversal of 1339860639 is 9360689331.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1339860629) and next prime (1339860649).

It is not a de Polignac number, because 1339860639 - 2¹¹ = 1339858591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1339860629) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9687 + ... + 52664.

It is an arithmetic number, because the mean of its divisors is an integer number (65469600).

Almost surely, 2^1339860639 is an apocalyptic number.

1339860639 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

1339860639 is a deficient number, since it is larger than the sum of its proper divisors (755166561).

1339860639 is a wasteful number, since it uses less digits than its factorization.

1339860639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62415.

The product of its (nonzero) digits is 629856, while the sum is 48.

The square root of 1339860639 is about 36604.1068597500. The cubic root of 1339860639 is about 1102.4355507597.

The spelling of 1339860639 in words is "one billion, three hundred thirty-nine million, eight hundred sixty thousand, six hundred thirty-nine".