1399263360 has 384 divisors, whose sum is σ = 5176785600. Its totient is φ = 320348160.

The previous prime is 1399263277. The next prime is 1399263361. The reversal of 1399263360 is 633629931.

It is a tau number, because it is divible by the number of its divisors (384).

It is not an unprimeable number, because it can be changed into a prime (1399263361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4413922 + ... + 4414238.

Almost surely, 2^1399263360 is an apocalyptic number.

1399263360 is a gapful number since it is divisible by the number (10) 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 1399263360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2588392800).

1399263360 is an abundant number, since it is smaller than the sum of its proper divisors (3777522240).

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

1399263360 is a wasteful number, since it uses less digits than its factorization.

1399263360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 157464, while the sum is 42.

The square root of 1399263360 is about 37406.7288064594. The cubic root of 1399263360 is about 1118.4927002722.

The spelling of 1399263360 in words is "one billion, three hundred ninety-nine million, two hundred sixty-three thousand, three hundred sixty".