1399303836 has 120 divisors (see below), whose sum is σ = 4199493760. Its totient is φ = 399643632.

The previous prime is 1399303783. The next prime is 1399303859. The reversal of 1399303836 is 6383039931.

It is a junction number, because it is equal to n+sod(n) for n = 1399303791 and 1399303800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 549855 + ... + 552393.

Almost surely, 2^1399303836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1399303836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2099746880).

1399303836 is an abundant number, since it is smaller than the sum of its proper divisors (2800189924).

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

1399303836 is an frugal number, since it uses more digits than its factorization.

1399303836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2577 (or 2551 counting only the distinct ones).

The product of its (nonzero) digits is 314928, while the sum is 45.

The square root of 1399303836 is about 37407.2698282032. The cubic root of 1399303836 is about 1118.5034849167.

The spelling of 1399303836 in words is "one billion, three hundred ninety-nine million, three hundred three thousand, eight hundred thirty-six".