1215445950 has 72 divisors (see below), whose sum is σ = 3272743656. Its totient is φ = 323400000.

The previous prime is 1215445939. The next prime is 1215445969. The reversal of 1215445950 is 595445121.

1215445950 is a `hidden beast` number, since 1 + 2 + 154 + 459 + 50 = 666.

It is a super-3 number, since 3×1215445950³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 218200 + ... + 223700.

It is an arithmetic number, because the mean of its divisors is an integer number (45454773).

Almost surely, 2^1215445950 is an apocalyptic number.

1215445950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215445950, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1636371828).

1215445950 is an abundant number, since it is smaller than the sum of its proper divisors (2057297706).

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

1215445950 is a wasteful number, since it uses less digits than its factorization.

1215445950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6010 (or 6002 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 1215445950 is about 34863.2464064952. The cubic root of 1215445950 is about 1067.1985265359.

The spelling of 1215445950 in words is "one billion, two hundred fifteen million, four hundred forty-five thousand, nine hundred fifty".