1399023360 has 288 divisors, whose sum is σ = 5674798080. Its totient is φ = 319721472.

The previous prime is 1399023343. The next prime is 1399023377. The reversal of 1399023360 is 633209931.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1399023343) and next prime (1399023377).

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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, 239029 + ... + 244811.

It is an arithmetic number, because the mean of its divisors is an integer number (19704160).

Almost surely, 2^1399023360 is an apocalyptic number.

1399023360 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 1399023360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2837399040).

1399023360 is an abundant number, since it is smaller than the sum of its proper divisors (4275774720).

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

1399023360 is an equidigital number, since it uses as much as digits as its factorization.

1399023360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5820 (or 5800 counting only the distinct ones).

The product of its (nonzero) digits is 26244, while the sum is 36.

The square root of 1399023360 is about 37403.5206899030. The cubic root of 1399023360 is about 1118.4287490998.

The spelling of 1399023360 in words is "one billion, three hundred ninety-nine million, twenty-three thousand, three hundred sixty".