1388277117 has 16 divisors (see below), whose sum is σ = 2100468480. Its totient is φ = 905825376.

The previous prime is 1388277109. The next prime is 1388277127. The reversal of 1388277117 is 7117728831.

It is a happy number.

It is not a de Polignac number, because 1388277117 - 2³ = 1388277109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388277127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 545728 + ... + 548265.

It is an arithmetic number, because the mean of its divisors is an integer number (131279280).

Almost surely, 2^1388277117 is an apocalyptic number.

It is an amenable number.

1388277117 is a deficient number, since it is larger than the sum of its proper divisors (712191363).

1388277117 is a wasteful number, since it uses less digits than its factorization.

1388277117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1094049 (or 1094043 counting only the distinct ones).

The product of its digits is 131712, while the sum is 45.

The square root of 1388277117 is about 37259.5909397835. The cubic root of 1388277117 is about 1115.5577433079.

The spelling of 1388277117 in words is "one billion, three hundred eighty-eight million, two hundred seventy-seven thousand, one hundred seventeen".