1381768 has 8 divisors (see below), whose sum is σ = 2590830. Its totient is φ = 690880.

The previous prime is 1381759. The next prime is 1381769. The reversal of 1381768 is 8671831.

It can be written as a sum of positive squares in only one way, i.e., 1340964 + 40804 = 1158^2 + 202^2 .

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86353 + ... + 86368.

2^1381768 is an apocalyptic number.

It is an amenable number.

1381768 is a deficient number, since it is larger than the sum of its proper divisors (1209062).

1381768 is a wasteful number, since it uses less digits than its factorization.

1381768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172727 (or 172723 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 1381768 is about 1175.4862823530. The cubic root of 1381768 is about 111.3811532376.

The spelling of 1381768 in words is "one million, three hundred eighty-one thousand, seven hundred sixty-eight".