1391338722 has 32 divisors (see below), whose sum is σ = 2838483648. Its totient is φ = 454499136.

The previous prime is 1391338699. The next prime is 1391338723. The reversal of 1391338722 is 2278331931.

It is not an unprimeable number, because it can be changed into a prime (1391338723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 345573 + ... + 349575.

It is an arithmetic number, because the mean of its divisors is an integer number (88702614).

Almost surely, 2^1391338722 is an apocalyptic number.

1391338722 is an abundant number, since it is smaller than the sum of its proper divisors (1447144926).

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

1391338722 is a wasteful number, since it uses less digits than its factorization.

1391338722 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5154.

The product of its digits is 54432, while the sum is 39.

The square root of 1391338722 is about 37300.6531042018. The cubic root of 1391338722 is about 1116.3771977490.

The spelling of 1391338722 in words is "one billion, three hundred ninety-one million, three hundred thirty-eight thousand, seven hundred twenty-two".