1278741168 has 100 divisors (see below), whose sum is σ = 3709168848. Its totient is φ = 425312640.

The previous prime is 1278741157. The next prime is 1278741179. The reversal of 1278741168 is 8611478721.

It is an interprime number because it is at equal distance from previous prime (1278741157) and next prime (1278741179).

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 19 ways as a sum of consecutive naturals, for example, 845533 + ... + 847043.

Almost surely, 2^1278741168 is an apocalyptic number.

1278741168 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 1278741168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1854584424).

1278741168 is an abundant number, since it is smaller than the sum of its proper divisors (2430427680).

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

1278741168 is a wasteful number, since it uses less digits than its factorization.

1278741168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2184 (or 2169 counting only the distinct ones).

The product of its digits is 150528, while the sum is 45.

The square root of 1278741168 is about 35759.4906003987. The cubic root of 1278741168 is about 1085.4109928326.

The spelling of 1278741168 in words is "one billion, two hundred seventy-eight million, seven hundred forty-one thousand, one hundred sixty-eight".