1216424238 has 8 divisors (see below), whose sum is σ = 2432848488. Its totient is φ = 405474744.

The previous prime is 1216424201. The next prime is 1216424263. The reversal of 1216424238 is 8324246121.

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

1216424238 is an admirable number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1216424199 and 1216424208.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 101368681 + ... + 101368692.

It is an arithmetic number, because the mean of its divisors is an integer number (304106061).

Almost surely, 2^1216424238 is an apocalyptic number.

1216424238 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.

1216424238 is a wasteful number, since it uses less digits than its factorization.

1216424238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 202737378.

The product of its digits is 18432, while the sum is 33.

The square root of 1216424238 is about 34877.2739473715. The cubic root of 1216424238 is about 1067.4847719620.

The spelling of 1216424238 in words is "one billion, two hundred sixteen million, four hundred twenty-four thousand, two hundred thirty-eight".