1349781328 has 40 divisors (see below), whose sum is σ = 2992308480. Its totient is φ = 577799040.

The previous prime is 1349781311. The next prime is 1349781331. The reversal of 1349781328 is 8231879431.

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 7 ways as a sum of consecutive naturals, for example, 95418 + ... + 108646.

It is an arithmetic number, because the mean of its divisors is an integer number (74807712).

Almost surely, 2^1349781328 is an apocalyptic number.

It is an amenable number.

1349781328 is an abundant number, since it is smaller than the sum of its proper divisors (1642527152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1349781328 is a wasteful number, since it uses less digits than its factorization.

1349781328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14155 (or 14149 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 1349781328 is about 36739.3702722298. The cubic root of 1349781328 is about 1105.1497727005.

The spelling of 1349781328 in words is "one billion, three hundred forty-nine million, seven hundred eighty-one thousand, three hundred twenty-eight".