1388916136 has 8 divisors (see below), whose sum is σ = 2604217770. Its totient is φ = 694458064.

The previous prime is 1388916127. The next prime is 1388916187. The reversal of 1388916136 is 6316198831.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1383393636 + 5522500 = 37194^2 + 2350^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86807251 + ... + 86807266.

Almost surely, 2^1388916136 is an apocalyptic number.

It is an amenable number.

1388916136 is a deficient number, since it is larger than the sum of its proper divisors (1215301634).

1388916136 is a wasteful number, since it uses less digits than its factorization.

1388916136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173614523 (or 173614519 counting only the distinct ones).

The product of its digits is 186624, while the sum is 46.

The square root of 1388916136 is about 37268.1651815594. The cubic root of 1388916136 is about 1115.7288794682.

The spelling of 1388916136 in words is "one billion, three hundred eighty-eight million, nine hundred sixteen thousand, one hundred thirty-six".