1213329328 has 10 divisors (see below), whose sum is σ = 2350825604. Its totient is φ = 606664656.

The previous prime is 1213329319. The next prime is 1213329329. The reversal of 1213329328 is 8239233121.

It is a junction number, because it is equal to n+sod(n) for n = 1213329293 and 1213329302.

It is not an unprimeable number, because it can be changed into a prime (1213329329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37916526 + ... + 37916557.

Almost surely, 2^1213329328 is an apocalyptic number.

It is an amenable number.

1213329328 is a deficient number, since it is larger than the sum of its proper divisors (1137496276).

1213329328 is an equidigital number, since it uses as much as digits as its factorization.

1213329328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75833091 (or 75833085 counting only the distinct ones).

The product of its digits is 15552, while the sum is 34.

The square root of 1213329328 is about 34832.8771134398. The cubic root of 1213329328 is about 1066.5786804161.

The spelling of 1213329328 in words is "one billion, two hundred thirteen million, three hundred twenty-nine thousand, three hundred twenty-eight".