1391942272 has 32 divisors (see below), whose sum is σ = 3169156320. Its totient is φ = 596546304.

The previous prime is 1391942263. The next prime is 1391942273. The reversal of 1391942272 is 2722491931.

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (1391942273) 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, 775858 + ... + 777649.

It is an arithmetic number, because the mean of its divisors is an integer number (99036135).

Almost surely, 2^1391942272 is an apocalyptic number.

It is an amenable number.

1391942272 is an abundant number, since it is smaller than the sum of its proper divisors (1777214048).

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

1391942272 is an equidigital number, since it uses as much as digits as its factorization.

1391942272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1553528 (or 1553516 counting only the distinct ones).

The product of its digits is 54432, while the sum is 40.

The square root of 1391942272 is about 37308.7425679290. The cubic root of 1391942272 is about 1116.5385991491.

The spelling of 1391942272 in words is "one billion, three hundred ninety-one million, nine hundred forty-two thousand, two hundred seventy-two".