1380843771 has 8 divisors (see below), whose sum is σ = 1848829440. Its totient is φ = 916710312.

The previous prime is 1380843733. The next prime is 1380843773. The reversal of 1380843771 is 1773480831.

It is a happy number.

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

It is not a de Polignac number, because 1380843771 - 2⁶ = 1380843707 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1380843773) 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, 962215 + ... + 963648.

It is an arithmetic number, because the mean of its divisors is an integer number (231103680).

Almost surely, 2^1380843771 is an apocalyptic number.

1380843771 is a deficient number, since it is larger than the sum of its proper divisors (467985669).

1380843771 is a wasteful number, since it uses less digits than its factorization.

1380843771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926105.

The product of its (nonzero) digits is 112896, while the sum is 42.

The square root of 1380843771 is about 37159.7062824775. The cubic root of 1380843771 is about 1113.5631437127.

The spelling of 1380843771 in words is "one billion, three hundred eighty million, eight hundred forty-three thousand, seven hundred seventy-one".