1397756216 has 16 divisors (see below), whose sum is σ = 2622135240. Its totient is φ = 698520160.

The previous prime is 1397756209. The next prime is 1397756219. The reversal of 1397756216 is 6126577931.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397756219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27770 + ... + 59721.

Almost surely, 2^1397756216 is an apocalyptic number.

It is an amenable number.

1397756216 is a deficient number, since it is larger than the sum of its proper divisors (1224379024).

1397756216 is a wasteful number, since it uses less digits than its factorization.

1397756216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89494 (or 89490 counting only the distinct ones).

The product of its digits is 476280, while the sum is 47.

The square root of 1397756216 is about 37386.5780193909. The cubic root of 1397756216 is about 1118.0909805281.

The spelling of 1397756216 in words is "one billion, three hundred ninety-seven million, seven hundred fifty-six thousand, two hundred sixteen".