1217328434 has 16 divisors (see below), whose sum is σ = 2105319168. Its totient is φ = 517094592.

The previous prime is 1217328421. The next prime is 1217328439. The reversal of 1217328434 is 4348237121.

It is a junction number, because it is equal to n+sod(n) for n = 1217328394 and 1217328403.

It is not an unprimeable number, because it can be changed into a prime (1217328439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 383162 + ... + 386325.

It is an arithmetic number, because the mean of its divisors is an integer number (131582448).

Almost surely, 2^1217328434 is an apocalyptic number.

1217328434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1217328434 is a deficient number, since it is larger than the sum of its proper divisors (887990734).

1217328434 is a wasteful number, since it uses less digits than its factorization.

1217328434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 769609.

The product of its digits is 32256, while the sum is 35.

The square root of 1217328434 is about 34890.2340777473. The cubic root of 1217328434 is about 1067.7492017483.

The spelling of 1217328434 in words is "one billion, two hundred seventeen million, three hundred twenty-eight thousand, four hundred thirty-four".