1216383950 has 12 divisors (see below), whose sum is σ = 2262474240. Its totient is φ = 486553560.

The previous prime is 1216383947. The next prime is 1216383953. The reversal of 1216383950 is 593836121.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1216383947) and next prime (1216383953).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1216383953) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12163790 + ... + 12163889.

It is an arithmetic number, because the mean of its divisors is an integer number (188539520).

Almost surely, 2^1216383950 is an apocalyptic number.

1216383950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1216383950 is a deficient number, since it is larger than the sum of its proper divisors (1046090290).

1216383950 is a wasteful number, since it uses less digits than its factorization.

1216383950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24327691 (or 24327686 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 38.

The square root of 1216383950 is about 34876.6963745135. The cubic root of 1216383950 is about 1067.4729867915.

The spelling of 1216383950 in words is "one billion, two hundred sixteen million, three hundred eighty-three thousand, nine hundred fifty".