1315896638 has 16 divisors (see below), whose sum is σ = 2316791904. Its totient is φ = 548713440.

The previous prime is 1315896619. The next prime is 1315896641. The reversal of 1315896638 is 8366985131.

It is a happy number.

It is a Curzon number.

It is a congruent number.

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, 1269653 + ... + 1270688.

It is an arithmetic number, because the mean of its divisors is an integer number (144799494).

Almost surely, 2^1315896638 is an apocalyptic number.

1315896638 is a deficient number, since it is larger than the sum of its proper divisors (1000895266).

1315896638 is a wasteful number, since it uses less digits than its factorization.

1315896638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2540387.

The product of its digits is 933120, while the sum is 50.

The square root of 1315896638 is about 36275.2896335784. The cubic root of 1315896638 is about 1095.8234565436.

The spelling of 1315896638 in words is "one billion, three hundred fifteen million, eight hundred ninety-six thousand, six hundred thirty-eight".