1386447738 has 16 divisors (see below), whose sum is σ = 2986195296. Its totient is φ = 426599280.

The previous prime is 1386447721. The next prime is 1386447739. The reversal of 1386447738 is 8377446831.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1386447739) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8887408 + ... + 8887563.

It is an arithmetic number, because the mean of its divisors is an integer number (186637206).

Almost surely, 2^1386447738 is an apocalyptic number.

1386447738 is an abundant number, since it is smaller than the sum of its proper divisors (1599747558).

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

1386447738 is a wasteful number, since it uses less digits than its factorization.

1386447738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17774989.

The product of its digits is 2709504, while the sum is 51.

The square root of 1386447738 is about 37235.0337451170. The cubic root of 1386447738 is about 1115.0675253869.

The spelling of 1386447738 in words is "one billion, three hundred eighty-six million, four hundred forty-seven thousand, seven hundred thirty-eight".