1386732447 has 16 divisors (see below), whose sum is σ = 2064854880. Its totient is φ = 919791936.

The previous prime is 1386732437. The next prime is 1386732493. The reversal of 1386732447 is 7442376831.

1386732447 is a `hidden beast` number, since 138 + 6 + 73 + 2 + 447 = 666.

It is not a de Polignac number, because 1386732447 - 2²⁷ = 1252514719 is a prime.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1386732437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 125038 + ... + 135675.

It is an arithmetic number, because the mean of its divisors is an integer number (129053430).

Almost surely, 2^1386732447 is an apocalyptic number.

1386732447 is a deficient number, since it is larger than the sum of its proper divisors (678122433).

1386732447 is a wasteful number, since it uses less digits than its factorization.

1386732447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260919 (or 260913 counting only the distinct ones).

The product of its digits is 677376, while the sum is 45.

The square root of 1386732447 is about 37238.8566822345. The cubic root of 1386732447 is about 1115.1438470597.

The spelling of 1386732447 in words is "one billion, three hundred eighty-six million, seven hundred thirty-two thousand, four hundred forty-seven".