3128742268 has 6 divisors (see below), whose sum is σ = 5475298976. Its totient is φ = 1564371132.

The previous prime is 3128742251. The next prime is 3128742319. The reversal of 3128742268 is 8622478213.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391092780 + ... + 391092787.

Almost surely, 2^3128742268 is an apocalyptic number.

It is an amenable number.

3128742268 is a deficient number, since it is larger than the sum of its proper divisors (2346556708).

3128742268 is a wasteful number, since it uses less digits than its factorization.

3128742268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 782185571 (or 782185569 counting only the distinct ones).

The product of its digits is 258048, while the sum is 43.

The square root of 3128742268 is about 55935.1612851880. The cubic root of 3128742268 is about 1462.5922340642.

The spelling of 3128742268 in words is "three billion, one hundred twenty-eight million, seven hundred forty-two thousand, two hundred sixty-eight".