1315381838 has 12 divisors (see below), whose sum is σ = 1987091592. Its totient is φ = 653022300.

The previous prime is 1315381777. The next prime is 1315381853. The reversal of 1315381838 is 8381835131.

It is a junction number, because it is equal to n+sod(n) for n = 1315381795 and 1315381804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 629231 + ... + 631317.

It is an arithmetic number, because the mean of its divisors is an integer number (165590966).

Almost surely, 2^1315381838 is an apocalyptic number.

1315381838 is a deficient number, since it is larger than the sum of its proper divisors (671709754).

1315381838 is an frugal number, since it uses more digits than its factorization.

1315381838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4327 (or 2240 counting only the distinct ones).

The product of its digits is 69120, while the sum is 41.

The square root of 1315381838 is about 36268.1932001030. The cubic root of 1315381838 is about 1095.6805366311.

The spelling of 1315381838 in words is "one billion, three hundred fifteen million, three hundred eighty-one thousand, eight hundred thirty-eight".