1391379238 has 4 divisors (see below), whose sum is σ = 2087068860. Its totient is φ = 695689618.

The previous prime is 1391379233. The next prime is 1391379271. The reversal of 1391379238 is 8329731931.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1391379233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 347844808 + ... + 347844811.

It is an arithmetic number, because the mean of its divisors is an integer number (521767215).

Almost surely, 2^1391379238 is an apocalyptic number.

1391379238 is a deficient number, since it is larger than the sum of its proper divisors (695689622).

1391379238 is an equidigital number, since it uses as much as digits as its factorization.

1391379238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 695689621.

The product of its digits is 244944, while the sum is 46.

The square root of 1391379238 is about 37301.1962006582. The cubic root of 1391379238 is about 1116.3880340031.

The spelling of 1391379238 in words is "one billion, three hundred ninety-one million, three hundred seventy-nine thousand, two hundred thirty-eight".