1338428956 has 12 divisors (see below), whose sum is σ = 2343031992. Its totient is φ = 668991248.

The previous prime is 1338428941. The next prime is 1338428957. The reversal of 1338428956 is 6598248331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1338428957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41935 + ... + 66598.

It is an arithmetic number, because the mean of its divisors is an integer number (195252666).

Almost surely, 2^1338428956 is an apocalyptic number.

It is an amenable number.

1338428956 is a deficient number, since it is larger than the sum of its proper divisors (1004603036).

1338428956 is a wasteful number, since it uses less digits than its factorization.

1338428956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111620 (or 111618 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 49.

The square root of 1338428956 is about 36584.5453162944. The cubic root of 1338428956 is about 1102.0427485303.

The spelling of 1338428956 in words is "one billion, three hundred thirty-eight million, four hundred twenty-eight thousand, nine hundred fifty-six".