1397751268 has 12 divisors (see below), whose sum is σ = 2463920172. Its totient is φ = 693774080.

The previous prime is 1397751263. The next prime is 1397751287. The reversal of 1397751268 is 8621577931.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1109023204 + 288728064 = 33302^2 + 16992^2 .

It is not an unprimeable number, because it can be changed into a prime (1397751263) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1274773 + ... + 1275868.

It is an arithmetic number, because the mean of its divisors is an integer number (205326681).

Almost surely, 2^1397751268 is an apocalyptic number.

It is an amenable number.

1397751268 is a deficient number, since it is larger than the sum of its proper divisors (1066168904).

1397751268 is a wasteful number, since it uses less digits than its factorization.

1397751268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550782 (or 2550780 counting only the distinct ones).

The product of its digits is 635040, while the sum is 49.

The square root of 1397751268 is about 37386.5118458516. The cubic root of 1397751268 is about 1118.0896611943.

The spelling of 1397751268 in words is "one billion, three hundred ninety-seven million, seven hundred fifty-one thousand, two hundred sixty-eight".