1381028756 has 24 divisors (see below), whose sum is σ = 2549292480. Its totient is φ = 652810752.

The previous prime is 1381028743. The next prime is 1381028809. The reversal of 1381028756 is 6578201831.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18356 + ... + 55668.

It is an arithmetic number, because the mean of its divisors is an integer number (106220520).

Almost surely, 2^1381028756 is an apocalyptic number.

It is an amenable number.

1381028756 is a deficient number, since it is larger than the sum of its proper divisors (1168263724).

1381028756 is a wasteful number, since it uses less digits than its factorization.

1381028756 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37823 (or 37821 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1381028756 is about 37162.1952527027. The cubic root of 1381028756 is about 1113.6128677255.

The spelling of 1381028756 in words is "one billion, three hundred eighty-one million, twenty-eight thousand, seven hundred fifty-six".