1578216960 has 480 divisors, whose sum is σ = 5898372480. Its totient is φ = 404103168.

The previous prime is 1578216953. The next prime is 1578216971. The reversal of 1578216960 is 696128751.

1578216960 is a `hidden beast` number, since 1 + 578 + 2 + 16 + 9 + 60 = 666.

It is a tau number, because it is divible by the number of its divisors (480).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 26749411 + ... + 26749469.

It is an arithmetic number, because the mean of its divisors is an integer number (12288276).

Almost surely, 2^1578216960 is an apocalyptic number.

1578216960 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 1578216960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2949186240).

1578216960 is an abundant number, since it is smaller than the sum of its proper divisors (4320155520).

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

1578216960 is an frugal number, since it uses more digits than its factorization.

1578216960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140 (or 112 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 1578216960 is about 39726.7788777293. The cubic root of 1578216960 is about 1164.2749908269.

The spelling of 1578216960 in words is "one billion, five hundred seventy-eight million, two hundred sixteen thousand, nine hundred sixty".