1278106368 has 144 divisors (see below), whose sum is σ = 4241185536. Its totient is φ = 331960320.

The previous prime is 1278106367. The next prime is 1278106381. The reversal of 1278106368 is 8636018721.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (1278106363) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 48330 + ... + 69942.

Almost surely, 2^1278106368 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278106368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2120592768).

1278106368 is an abundant number, since it is smaller than the sum of its proper divisors (2963079168).

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

1278106368 is a wasteful number, since it uses less digits than its factorization.

1278106368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21650 (or 21636 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 1278106368 is about 35750.6135331969. The cubic root of 1278106368 is about 1085.2313544605.

The spelling of 1278106368 in words is "one billion, two hundred seventy-eight million, one hundred six thousand, three hundred sixty-eight".