1386243726 has 32 divisors (see below), whose sum is σ = 3228346368. Its totient is φ = 388596000.

The previous prime is 1386243707. The next prime is 1386243773. The reversal of 1386243726 is 6273426831.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 309150 + ... + 313601.

It is an arithmetic number, because the mean of its divisors is an integer number (100885824).

Almost surely, 2^1386243726 is an apocalyptic number.

1386243726 is an abundant number, since it is smaller than the sum of its proper divisors (1842102642).

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

1386243726 is a wasteful number, since it uses less digits than its factorization.

1386243726 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 622816.

The product of its digits is 290304, while the sum is 42.

The square root of 1386243726 is about 37232.2941275447. The cubic root of 1386243726 is about 1115.0128296566.

The spelling of 1386243726 in words is "one billion, three hundred eighty-six million, two hundred forty-three thousand, seven hundred twenty-six".