1215898992 has 240 divisors, whose sum is σ = 4385552640. Its totient is φ = 315722880.

The previous prime is 1215898991. The next prime is 1215899011. The reversal of 1215898992 is 2998985121.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1215898991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 364243 + ... + 367565.

It is an arithmetic number, because the mean of its divisors is an integer number (18273136).

Almost surely, 2^1215898992 is an apocalyptic number.

1215898992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1215898992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2192776320).

1215898992 is an abundant number, since it is smaller than the sum of its proper divisors (3169653648).

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

1215898992 is a wasteful number, since it uses less digits than its factorization.

1215898992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3369 (or 3346 counting only the distinct ones).

The product of its digits is 933120, while the sum is 54.

The square root of 1215898992 is about 34869.7432167201. The cubic root of 1215898992 is about 1067.3311049518.

The spelling of 1215898992 in words is "one billion, two hundred fifteen million, eight hundred ninety-eight thousand, nine hundred ninety-two".