1391339712 has 224 divisors, whose sum is σ = 4416755200. Its totient is φ = 386104320.

The previous prime is 1391339701. The next prime is 1391339717. The reversal of 1391339712 is 2179331931.

It is a tau number, because it is divible by the number of its divisors (224).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391339717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2436387 + ... + 2436957.

Almost surely, 2^1391339712 is an apocalyptic number.

1391339712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1391339712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2208377600).

1391339712 is an abundant number, since it is smaller than the sum of its proper divisors (3025415488).

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

1391339712 is an equidigital number, since it uses as much as digits as its factorization.

1391339712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 644 (or 620 counting only the distinct ones).

The product of its digits is 30618, while the sum is 39.

The square root of 1391339712 is about 37300.6663747446. Note that the first 3 decimals coincide. The cubic root of 1391339712 is about 1116.3774625331.

The spelling of 1391339712 in words is "one billion, three hundred ninety-one million, three hundred thirty-nine thousand, seven hundred twelve".