1339939940 has 12 divisors (see below), whose sum is σ = 2813873916. Its totient is φ = 535975968.

The previous prime is 1339939927. The next prime is 1339939961. The reversal of 1339939940 is 499399331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 981443584 + 358496356 = 31328^2 + 18934^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33498479 + ... + 33498518.

It is an arithmetic number, because the mean of its divisors is an integer number (234489493).

Almost surely, 2^1339939940 is an apocalyptic number.

1339939940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1339939940 is an abundant number, since it is smaller than the sum of its proper divisors (1473933976).

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

1339939940 is a wasteful number, since it uses less digits than its factorization.

1339939940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66997006 (or 66997004 counting only the distinct ones).

The product of its (nonzero) digits is 708588, while the sum is 50.

The square root of 1339939940 is about 36605.1900691692. The cubic root of 1339939940 is about 1102.4572999164.

The spelling of 1339939940 in words is "one billion, three hundred thirty-nine million, nine hundred thirty-nine thousand, nine hundred forty".