1386505332 has 18 divisors (see below), whose sum is σ = 3504777458. Its totient is φ = 462168432.

The previous prime is 1386505321. The next prime is 1386505339. The reversal of 1386505332 is 2335056831.

It can be written as a sum of positive squares in only one way, i.e., 1383393636 + 3111696 = 37194^2 + 1764^2 .

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

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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: 38514037 = 1386505332 / (1 + 3 + 8 + 6 + 5 + 0 + 5 + 3 + 3 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386505339) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 19256983 + ... + 19257054.

Almost surely, 2^1386505332 is an apocalyptic number.

1386505332 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1386505332 is an abundant number, since it is smaller than the sum of its proper divisors (2118272126).

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

1386505332 is a wasteful number, since it uses less digits than its factorization.

1386505332 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38514047 (or 38514042 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The square root of 1386505332 is about 37235.8071216403. The cubic root of 1386505332 is about 1115.0829653991.

The spelling of 1386505332 in words is "one billion, three hundred eighty-six million, five hundred five thousand, three hundred thirty-two".