1386138312 has 128 divisors (see below), whose sum is σ = 4364976000. Its totient is φ = 404040960.

The previous prime is 1386138287. The next prime is 1386138329. The reversal of 1386138312 is 2138316831.

1386138312 is a `hidden beast` number, since 1 + 3 + 8 + 613 + 8 + 31 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

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, 40362 + ... + 66342.

It is an arithmetic number, because the mean of its divisors is an integer number (34101375).

Almost surely, 2^1386138312 is an apocalyptic number.

1386138312 is a gapful number since it is divisible by the number (12) 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 1386138312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2182488000).

1386138312 is an abundant number, since it is smaller than the sum of its proper divisors (2978837688).

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

1386138312 is a wasteful number, since it uses less digits than its factorization.

1386138312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26028 (or 26018 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 1386138312 is about 37230.8784747285. The cubic root of 1386138312 is about 1114.9845660019.

The spelling of 1386138312 in words is "one billion, three hundred eighty-six million, one hundred thirty-eight thousand, three hundred twelve".