1393439268 has 96 divisors (see below), whose sum is σ = 3731890176. Its totient is φ = 401334912.

The previous prime is 1393439263. The next prime is 1393439293. The reversal of 1393439268 is 8629343931.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1393439263) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164505 + ... + 172767.

It is an arithmetic number, because the mean of its divisors is an integer number (38873856).

Almost surely, 2^1393439268 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 1393439268, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1865945088).

1393439268 is an abundant number, since it is smaller than the sum of its proper divisors (2338450908).

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

1393439268 is a wasteful number, since it uses less digits than its factorization.

1393439268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8353 (or 8351 counting only the distinct ones).

The product of its digits is 839808, while the sum is 48.

The square root of 1393439268 is about 37328.7994449326. The cubic root of 1393439268 is about 1116.9387246924.

The spelling of 1393439268 in words is "one billion, three hundred ninety-three million, four hundred thirty-nine thousand, two hundred sixty-eight".