1397107738 has 16 divisors (see below), whose sum is σ = 2272019400. Its totient is φ = 640489536.

The previous prime is 1397107729. The next prime is 1397107801. The reversal of 1397107738 is 8377017931.

It can be written as a sum of positive squares in 4 ways, for example, as 778242609 + 618865129 = 27897^2 + 24877^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 176445 + ... + 184192.

Almost surely, 2^1397107738 is an apocalyptic number.

1397107738 is a deficient number, since it is larger than the sum of its proper divisors (874911662).

1397107738 is a wasteful number, since it uses less digits than its factorization.

1397107738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 360801.

The product of its (nonzero) digits is 222264, while the sum is 46.

The square root of 1397107738 is about 37377.9044088884. The cubic root of 1397107738 is about 1117.9180439431.

The spelling of 1397107738 in words is "one billion, three hundred ninety-seven million, one hundred seven thousand, seven hundred thirty-eight".