1391279268 has 24 divisors (see below), whose sum is σ = 3249019872. Its totient is φ = 463373824.

The previous prime is 1391279249. The next prime is 1391279273. The reversal of 1391279268 is 8629721931.

1391279268 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

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, 33030 + ... + 62237.

It is an arithmetic number, because the mean of its divisors is an integer number (135375828).

Almost surely, 2^1391279268 is an apocalyptic number.

It is an amenable number.

1391279268 is an abundant number, since it is smaller than the sum of its proper divisors (1857740604).

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

1391279268 is a wasteful number, since it uses less digits than its factorization.

1391279268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96491 (or 96489 counting only the distinct ones).

The product of its digits is 326592, while the sum is 48.

The square root of 1391279268 is about 37299.8561391328. The cubic root of 1391279268 is about 1116.3612960293.

The spelling of 1391279268 in words is "one billion, three hundred ninety-one million, two hundred seventy-nine thousand, two hundred sixty-eight".