1388647115 has 8 divisors (see below), whose sum is σ = 1666746720. Its totient is φ = 1110670912.

The previous prime is 1388647097. The next prime is 1388647151. The reversal of 1388647115 is 5117468831.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1388647115 - 2¹⁴ = 1388630731 is a prime.

It is a super-3 number, since 3×1388647115³ (a number of 28 digits) contains 333 as substring.

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, 3959 + ... + 52848.

It is an arithmetic number, because the mean of its divisors is an integer number (208343340).

Almost surely, 2^1388647115 is an apocalyptic number.

1388647115 is a deficient number, since it is larger than the sum of its proper divisors (278099605).

1388647115 is an equidigital number, since it uses as much as digits as its factorization.

1388647115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61701.

The product of its digits is 161280, while the sum is 44.

The square root of 1388647115 is about 37264.5557467146. Note that the first 3 decimals coincide. The cubic root of 1388647115 is about 1115.6568391502.

The spelling of 1388647115 in words is "one billion, three hundred eighty-eight million, six hundred forty-seven thousand, one hundred fifteen".