1278148236 has 12 divisors (see below), whose sum is σ = 2982345912. Its totient is φ = 426049408.

The previous prime is 1278148217. The next prime is 1278148241. The reversal of 1278148236 is 6328418721.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53256165 + ... + 53256188.

It is an arithmetic number, because the mean of its divisors is an integer number (248528826).

Almost surely, 2^1278148236 is an apocalyptic number.

It is an amenable number.

1278148236 is an abundant number, since it is smaller than the sum of its proper divisors (1704197676).

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

1278148236 is a wasteful number, since it uses less digits than its factorization.

1278148236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106512360 (or 106512358 counting only the distinct ones).

The product of its digits is 129024, while the sum is 42.

The square root of 1278148236 is about 35751.1990847860. The cubic root of 1278148236 is about 1085.2432042750.

The spelling of 1278148236 in words is "one billion, two hundred seventy-eight million, one hundred forty-eight thousand, two hundred thirty-six".