1380392279 has 6 divisors (see below), whose sum is σ = 1605762504. Its totient is φ = 1183193340.

The previous prime is 1380392267. The next prime is 1380392323. The reversal of 1380392279 is 9722930831.

It is a happy number.

It is not a de Polignac number, because 1380392279 - 2¹⁶ = 1380326743 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380392239) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14085587 + ... + 14085684.

It is an arithmetic number, because the mean of its divisors is an integer number (267627084).

Almost surely, 2^1380392279 is an apocalyptic number.

1380392279 is a deficient number, since it is larger than the sum of its proper divisors (225370225).

1380392279 is an equidigital number, since it uses as much as digits as its factorization.

1380392279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28171285 (or 28171278 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 1380392279 is about 37153.6307647045. The cubic root of 1380392279 is about 1113.4417639043.

The spelling of 1380392279 in words is "one billion, three hundred eighty million, three hundred ninety-two thousand, two hundred seventy-nine".