1386316880 has 40 divisors (see below), whose sum is σ = 3471126792. Its totient is φ = 511870464.

The previous prime is 1386316859. The next prime is 1386316909. The reversal of 1386316880 is 886136831.

It can be written as a sum of positive squares in 4 ways, for example, as 51437584 + 1334879296 = 7172^2 + 36536^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665459 + ... + 667538.

Almost surely, 2^1386316880 is an apocalyptic number.

1386316880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1386316880 is an abundant number, since it is smaller than the sum of its proper divisors (2084809912).

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

1386316880 is a wasteful number, since it uses less digits than its factorization.

1386316880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1333023 (or 1333017 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 44.

The square root of 1386316880 is about 37233.2765144299. The cubic root of 1386316880 is about 1115.0324429017.

The spelling of 1386316880 in words is "one billion, three hundred eighty-six million, three hundred sixteen thousand, eight hundred eighty".