1239997568 has 32 divisors (see below), whose sum is σ = 2484631260. Its totient is φ = 616403968.

The previous prime is 1239997559. The next prime is 1239997607. The reversal of 1239997568 is 8657999321.

It can be written as a sum of positive squares in 2 ways, for example, as 1194946624 + 45050944 = 34568^2 + 6712^2 .

It is a tau number, because it is divible by the number of its divisors (32).

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 3 ways as a sum of consecutive naturals, for example, 5855 + ... + 50142.

Almost surely, 2^1239997568 is an apocalyptic number.

It is an amenable number.

1239997568 is an abundant number, since it is smaller than the sum of its proper divisors (1244633692).

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

1239997568 is an equidigital number, since it uses as much as digits as its factorization.

1239997568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56184 (or 56172 counting only the distinct ones).

The product of its digits is 7348320, while the sum is 59.

The square root of 1239997568 is about 35213.5991912216. The cubic root of 1239997568 is about 1074.3363686262.

The spelling of 1239997568 in words is "one billion, two hundred thirty-nine million, nine hundred ninety-seven thousand, five hundred sixty-eight".