1397220608 has 36 divisors (see below), whose sum is σ = 3187413600. Its totient is φ = 598808064.

The previous prime is 1397220607. The next prime is 1397220637. The reversal of 1397220608 is 8060227931.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397220607) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 388058 + ... + 391641.

Almost surely, 2^1397220608 is an apocalyptic number.

It is an amenable number.

1397220608 is an abundant number, since it is smaller than the sum of its proper divisors (1790192992).

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

1397220608 is an frugal number, since it uses more digits than its factorization.

1397220608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 779722 (or 779708 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1397220608 is about 37379.4142276200. The cubic root of 1397220608 is about 1117.9481480427.

The spelling of 1397220608 in words is "one billion, three hundred ninety-seven million, two hundred twenty thousand, six hundred eight".