1578775968 has 384 divisors, whose sum is σ = 6048000000. Its totient is φ = 388177920.

The previous prime is 1578775963. The next prime is 1578775981. The reversal of 1578775968 is 8695778751.

1578775968 is a `hidden beast` number, since 1 + 578 + 7 + 7 + 59 + 6 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (1578775963) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1263408 + ... + 1264656.

It is an arithmetic number, because the mean of its divisors is an integer number (15750000).

Almost surely, 2^1578775968 is an apocalyptic number.

1578775968 is a gapful number since it is divisible by the number (18) 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 1578775968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3024000000).

1578775968 is an abundant number, since it is smaller than the sum of its proper divisors (4469224032).

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

1578775968 is a wasteful number, since it uses less digits than its factorization.

1578775968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1291 counting only the distinct ones).

The product of its digits is 29635200, while the sum is 63.

The square root of 1578775968 is about 39733.8139120825. The cubic root of 1578775968 is about 1164.4124375411.

The spelling of 1578775968 in words is "one billion, five hundred seventy-eight million, seven hundred seventy-five thousand, nine hundred sixty-eight".