1216332426 has 8 divisors (see below), whose sum is σ = 2432664864. Its totient is φ = 405444140.

The previous prime is 1216332419. The next prime is 1216332431. The reversal of 1216332426 is 6242336121.

It is a sphenic number, since it is the product of 3 distinct primes.

1216332426 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 1216332393 and 1216332402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 101361030 + ... + 101361041.

It is an arithmetic number, because the mean of its divisors is an integer number (304083108).

Almost surely, 2^1216332426 is an apocalyptic number.

1216332426 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1216332426 is a wasteful number, since it uses less digits than its factorization.

1216332426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202722076.

The product of its digits is 10368, while the sum is 30.

The square root of 1216332426 is about 34875.9577072802. The cubic root of 1216332426 is about 1067.4579144522.

Adding to 1216332426 its reverse (6242336121), we get a palindrome (7458668547).

The spelling of 1216332426 in words is "one billion, two hundred sixteen million, three hundred thirty-two thousand, four hundred twenty-six".