1315638078 has 16 divisors (see below), whose sum is σ = 2716156416. Its totient is φ = 424399320.

The previous prime is 1315638073. The next prime is 1315638083. The reversal of 1315638078 is 8708365131.

It is an interprime number because it is at equal distance from previous prime (1315638073) and next prime (1315638083).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315638073) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3536476 + ... + 3536847.

It is an arithmetic number, because the mean of its divisors is an integer number (169759776).

Almost surely, 2^1315638078 is an apocalyptic number.

1315638078 is an abundant number, since it is smaller than the sum of its proper divisors (1400518338).

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

1315638078 is a wasteful number, since it uses less digits than its factorization.

1315638078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7073359.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1315638078 is about 36271.7255999766. The cubic root of 1315638078 is about 1095.7516792058.

The spelling of 1315638078 in words is "one billion, three hundred fifteen million, six hundred thirty-eight thousand, seventy-eight".