1381028 has 12 divisors (see below), whose sum is σ = 2636592. Its totient is φ = 627720.

The previous prime is 1381027. The next prime is 1381033. The reversal of 1381028 is 8201831.

It is a junction number, because it is equal to n+sod(n) for n = 1380994 and 1381012.

It is not an unprimeable number, because it can be changed into a prime (1381027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15650 + ... + 15737.

It is an arithmetic number, because the mean of its divisors is an integer number (219716).

2^1381028 is an apocalyptic number.

It is an amenable number.

1381028 is a deficient number, since it is larger than the sum of its proper divisors (1255564).

1381028 is a wasteful number, since it uses less digits than its factorization.

1381028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31402 (or 31400 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1381028 is about 1175.1714768492. The cubic root of 1381028 is about 111.3612664522.

Adding to 1381028 its reverse (8201831), we get a palindrome (9582859).

The spelling of 1381028 in words is "one million, three hundred eighty-one thousand, twenty-eight".