1380886805 has 8 divisors (see below), whose sum is σ = 1701849912. Its totient is φ = 1074852288.

The previous prime is 1380886789. The next prime is 1380886813. The reversal of 1380886805 is 5086880831.

It can be written as a sum of positive squares in 4 ways, for example, as 766293124 + 614593681 = 27682^2 + 24791^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1380886805 - 2⁴ = 1380886789 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1380886805.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3731942 + ... + 3732311.

It is an arithmetic number, because the mean of its divisors is an integer number (212731239).

Almost surely, 2^1380886805 is an apocalyptic number.

It is an amenable number.

1380886805 is a deficient number, since it is larger than the sum of its proper divisors (320963107).

1380886805 is an equidigital number, since it uses as much as digits as its factorization.

1380886805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7464295.

The product of its (nonzero) digits is 368640, while the sum is 47.

The square root of 1380886805 is about 37160.2853191415. The cubic root of 1380886805 is about 1113.5747116587.

The spelling of 1380886805 in words is "one billion, three hundred eighty million, eight hundred eighty-six thousand, eight hundred five".