1278376396 has 12 divisors (see below), whose sum is σ = 2440536840. Its totient is φ = 581080160.

The previous prime is 1278376327. The next prime is 1278376397. The reversal of 1278376396 is 6936738721.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1278376397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14526961 + ... + 14527048.

It is an arithmetic number, because the mean of its divisors is an integer number (203378070).

Almost surely, 2^1278376396 is an apocalyptic number.

It is an amenable number.

1278376396 is a deficient number, since it is larger than the sum of its proper divisors (1162160444).

1278376396 is a wasteful number, since it uses less digits than its factorization.

1278376396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29054024 (or 29054022 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 52.

The square root of 1278376396 is about 35754.3898843205. The cubic root of 1278376396 is about 1085.3077753867.

The spelling of 1278376396 in words is "one billion, two hundred seventy-eight million, three hundred seventy-six thousand, three hundred ninety-six".