1386841509 has 48 divisors (see below), whose sum is σ = 2134753920. Its totient is φ = 866194560.

The previous prime is 1386841507. The next prime is 1386841529. The reversal of 1386841509 is 9051486831.

1386841509 is a `hidden beast` number, since 138 + 6 + 8 + 4 + 1 + 509 = 666.

It is not a de Polignac number, because 1386841509 - 2¹ = 1386841507 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386841501) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1241019 + ... + 1242135.

It is an arithmetic number, because the mean of its divisors is an integer number (44474040).

Almost surely, 2^1386841509 is an apocalyptic number.

It is an amenable number.

1386841509 is a deficient number, since it is larger than the sum of its proper divisors (747912411).

1386841509 is a wasteful number, since it uses less digits than its factorization.

1386841509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1290 (or 1287 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1386841509 is about 37240.3210109687. The cubic root of 1386841509 is about 1115.1730804398.

The spelling of 1386841509 in words is "one billion, three hundred eighty-six million, eight hundred forty-one thousand, five hundred nine".