1386843920 has 240 divisors, whose sum is σ = 4111653504. Its totient is φ = 425779200.

The previous prime is 1386843907. The next prime is 1386843977. The reversal of 1386843920 is 293486831.

It is a Smith number, since the sum of its digits (44) 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 (44).

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 47 ways as a sum of consecutive naturals, for example, 6572615 + ... + 6572825.

Almost surely, 2^1386843920 is an apocalyptic number.

1386843920 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 1386843920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2055826752).

1386843920 is an abundant number, since it is smaller than the sum of its proper divisors (2724809584).

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

1386843920 is a wasteful number, since it uses less digits than its factorization.

1386843920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 350 (or 333 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 1386843920 is about 37240.3533817820. The cubic root of 1386843920 is about 1115.1737266758.

The spelling of 1386843920 in words is "one billion, three hundred eighty-six million, eight hundred forty-three thousand, nine hundred twenty".