1399647312 has 240 divisors, whose sum is σ = 4763266560. Its totient is φ = 374761728.

The previous prime is 1399647289. The next prime is 1399647317. The reversal of 1399647312 is 2137469931.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1399647317) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2048923 + ... + 2049605.

It is an arithmetic number, because the mean of its divisors is an integer number (19846944).

Almost surely, 2^1399647312 is an apocalyptic number.

1399647312 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 1399647312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2381633280).

1399647312 is an abundant number, since it is smaller than the sum of its proper divisors (3363619248).

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

1399647312 is a wasteful number, since it uses less digits than its factorization.

1399647312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 830 (or 821 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 1399647312 is about 37411.8605792334. The cubic root of 1399647312 is about 1118.5949941524.

The spelling of 1399647312 in words is "one billion, three hundred ninety-nine million, six hundred forty-seven thousand, three hundred twelve".