1249968388 has 6 divisors (see below), whose sum is σ = 2187444686. Its totient is φ = 624984192.

The previous prime is 1249968359. The next prime is 1249968397. The reversal of 1249968388 is 8838699421.

It can be written as a sum of positive squares in only one way, i.e., 881021124 + 368947264 = 29682^2 + 19208^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 156246045 + ... + 156246052.

Almost surely, 2^1249968388 is an apocalyptic number.

It is an amenable number.

1249968388 is a deficient number, since it is larger than the sum of its proper divisors (937476298).

1249968388 is a wasteful number, since it uses less digits than its factorization.

1249968388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312492101 (or 312492099 counting only the distinct ones).

The product of its digits is 5971968, while the sum is 58.

The square root of 1249968388 is about 35354.8919953095. The cubic root of 1249968388 is about 1077.2082641408.

The spelling of 1249968388 in words is "one billion, two hundred forty-nine million, nine hundred sixty-eight thousand, three hundred eighty-eight".