1388564 has 6 divisors (see below), whose sum is σ = 2429994. Its totient is φ = 694280.

The previous prime is 1388483. The next prime is 1388587. The reversal of 1388564 is 4658831.

It can be written as a sum of positive squares in only one way, i.e., 795664 + 592900 = 892^2 + 770^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 173567 + ... + 173574.

It is an arithmetic number, because the mean of its divisors is an integer number (404999).

2^1388564 is an apocalyptic number.

It is an amenable number.

1388564 is a deficient number, since it is larger than the sum of its proper divisors (1041430).

1388564 is a wasteful number, since it uses less digits than its factorization.

1388564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 347145 (or 347143 counting only the distinct ones).

The product of its digits is 23040, while the sum is 35.

The square root of 1388564 is about 1178.3734552340. The cubic root of 1388564 is about 111.5634580155.

The spelling of 1388564 in words is "one million, three hundred eighty-eight thousand, five hundred sixty-four".