1215832800 has 576 divisors, whose sum is σ = 5144670720. Its totient is φ = 242196480.

The previous prime is 1215832799. The next prime is 1215832817. The reversal of 1215832800 is 82385121.

It is a Harshad number since it is a multiple of its sum of digits (30).

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 95 ways as a sum of consecutive naturals, for example, 4149454 + ... + 4149746.

It is an arithmetic number, because the mean of its divisors is an integer number (8931720).

Almost surely, 2^1215832800 is an apocalyptic number.

1215832800 is a gapful number since it is divisible by the number (10) 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 1215832800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2572335360).

1215832800 is an abundant number, since it is smaller than the sum of its proper divisors (3928837920).

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

1215832800 is a wasteful number, since it uses less digits than its factorization.

1215832800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 355 (or 342 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 1215832800 is about 34868.7940714903. The cubic root of 1215832800 is about 1067.3117365495.

The spelling of 1215832800 in words is "one billion, two hundred fifteen million, eight hundred thirty-two thousand, eight hundred".