1080438391 has 4 divisors (see below), whose sum is σ = 1083847032. Its totient is φ = 1077029752.

The previous prime is 1080438389. The next prime is 1080438407. The reversal of 1080438391 is 1938340801.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1080438391 - 2¹ = 1080438389 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 1080438391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1080430391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1703845 + ... + 1704478.

It is an arithmetic number, because the mean of its divisors is an integer number (270961758).

Almost surely, 2^1080438391 is an apocalyptic number.

1080438391 is a deficient number, since it is larger than the sum of its proper divisors (3408641).

1080438391 is an equidigital number, since it uses as much as digits as its factorization.

1080438391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3408640.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 1080438391 is about 32870.0226802477. The cubic root of 1080438391 is about 1026.1243710908.

The spelling of 1080438391 in words is "one billion, eighty million, four hundred thirty-eight thousand, three hundred ninety-one".