1386138132 has 18 divisors (see below), whose sum is σ = 3503849258. Its totient is φ = 462046032.

The previous prime is 1386138121. The next prime is 1386138133. The reversal of 1386138132 is 2318316831.

1386138132 is a `hidden beast` number, since 1 + 3 + 8 + 613 + 8 + 1 + 32 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1328165136 + 57972996 = 36444^2 + 7614^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 38503837 = 1386138132 / (1 + 3 + 8 + 6 + 1 + 3 + 8 + 1 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386138133) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19251883 + ... + 19251954.

Almost surely, 2^1386138132 is an apocalyptic number.

1386138132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1386138132 is an abundant number, since it is smaller than the sum of its proper divisors (2117711126).

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

1386138132 is a wasteful number, since it uses less digits than its factorization.

1386138132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38503847 (or 38503842 counting only the distinct ones).

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

The square root of 1386138132 is about 37230.8760573801. The cubic root of 1386138132 is about 1114.9845177390.

The spelling of 1386138132 in words is "one billion, three hundred eighty-six million, one hundred thirty-eight thousand, one hundred thirty-two".