1397993076 has 36 divisors (see below), whose sum is σ = 3536785252. Its totient is φ = 465606144.

The previous prime is 1397993071. The next prime is 1397993099. The reversal of 1397993076 is 6703997931.

It can be written as a sum of positive squares in 2 ways, for example, as 1272776976 + 125216100 = 35676^2 + 11190^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397993071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28836 + ... + 60228.

Almost surely, 2^1397993076 is an apocalyptic number.

It is an amenable number.

1397993076 is an abundant number, since it is smaller than the sum of its proper divisors (2138792176).

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

1397993076 is a wasteful number, since it uses less digits than its factorization.

1397993076 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32640 (or 32635 counting only the distinct ones).

The product of its (nonzero) digits is 1928934, while the sum is 54.

The square root of 1397993076 is about 37389.7455995625. The cubic root of 1397993076 is about 1118.1541331887.

The spelling of 1397993076 in words is "one billion, three hundred ninety-seven million, nine hundred ninety-three thousand, seventy-six".