1387444 has 12 divisors (see below), whose sum is σ = 2469600. Its totient is φ = 681848.

The previous prime is 1387433. The next prime is 1387499. The reversal of 1387444 is 4447831.

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2704 + ... + 3175.

It is an arithmetic number, because the mean of its divisors is an integer number (205800).

2^1387444 is an apocalyptic number.

It is an amenable number.

1387444 is a deficient number, since it is larger than the sum of its proper divisors (1082156).

1387444 is a wasteful number, since it uses less digits than its factorization.

1387444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5942 (or 5940 counting only the distinct ones).

The product of its digits is 10752, while the sum is 31.

The square root of 1387444 is about 1177.8981280230. The cubic root of 1387444 is about 111.5334546733.

The spelling of 1387444 in words is "one million, three hundred eighty-seven thousand, four hundred forty-four".