1388936 has 8 divisors (see below), whose sum is σ = 2604270. Its totient is φ = 694464.

The previous prime is 1388927. The next prime is 1388941. The reversal of 1388936 is 6398831.

It can be written as a sum of positive squares in only one way, i.e., 1144900 + 244036 = 1070^2 + 494^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 1388936.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86801 + ... + 86816.

2^1388936 is an apocalyptic number.

It is an amenable number.

1388936 is a deficient number, since it is larger than the sum of its proper divisors (1215334).

1388936 is a wasteful number, since it uses less digits than its factorization.

1388936 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173623 (or 173619 counting only the distinct ones).

The product of its digits is 31104, while the sum is 38.

The square root of 1388936 is about 1178.5312893598. The cubic root of 1388936 is about 111.5734198420.

The spelling of 1388936 in words is "one million, three hundred eighty-eight thousand, nine hundred thirty-six".