1296196628 has 6 divisors (see below), whose sum is σ = 2268344106. Its totient is φ = 648098312.

The previous prime is 1296196621. The next prime is 1296196631. The reversal of 1296196628 is 8266916921.

It can be written as a sum of positive squares in only one way, i.e., 1272206224 + 23990404 = 35668^2 + 4898^2 .

It is a super-3 number, since 3×1296196628³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1296196621) 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 as a sum of consecutive naturals, namely, 162024575 + ... + 162024582.

It is an arithmetic number, because the mean of its divisors is an integer number (378057351).

Almost surely, 2^1296196628 is an apocalyptic number.

It is an amenable number.

1296196628 is a deficient number, since it is larger than the sum of its proper divisors (972147478).

1296196628 is a wasteful number, since it uses less digits than its factorization.

1296196628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324049161 (or 324049159 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The square root of 1296196628 is about 36002.7308408682. The cubic root of 1296196628 is about 1090.3274913042.

The spelling of 1296196628 in words is "one billion, two hundred ninety-six million, one hundred ninety-six thousand, six hundred twenty-eight".