1399719888 has 240 divisors, whose sum is σ = 4839868800. Its totient is φ = 376169472.

The previous prime is 1399719883. The next prime is 1399719889. The reversal of 1399719888 is 8889179931.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (63).

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 (1399719883) 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, 838831 + ... + 840497.

It is an arithmetic number, because the mean of its divisors is an integer number (20166120).

Almost surely, 2^1399719888 is an apocalyptic number.

1399719888 is a gapful number since it is divisible by the number (18) 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 1399719888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2419934400).

1399719888 is an abundant number, since it is smaller than the sum of its proper divisors (3440148912).

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

1399719888 is a wasteful number, since it uses less digits than its factorization.

1399719888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1719 (or 1696 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 63.

The square root of 1399719888 is about 37412.8305264384. The cubic root of 1399719888 is about 1118.6143280104.

The spelling of 1399719888 in words is "one billion, three hundred ninety-nine million, seven hundred nineteen thousand, eight hundred eighty-eight".