1386828408 has 128 divisors (see below), whose sum is σ = 4035870720. Its totient is φ = 388955520.

The previous prime is 1386828383. The next prime is 1386828419. The reversal of 1386828408 is 8048286831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3778641 + ... + 3779007.

It is an arithmetic number, because the mean of its divisors is an integer number (31530240).

Almost surely, 2^1386828408 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 1386828408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2017935360).

1386828408 is an abundant number, since it is smaller than the sum of its proper divisors (2649042312).

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

1386828408 is a wasteful number, since it uses less digits than its factorization.

1386828408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737 (or 733 counting only the distinct ones).

The product of its (nonzero) digits is 589824, while the sum is 48.

The square root of 1386828408 is about 37240.1451124992. The cubic root of 1386828408 is about 1115.1695688805.

The spelling of 1386828408 in words is "one billion, three hundred eighty-six million, eight hundred twenty-eight thousand, four hundred eight".