1278770922 has 64 divisors (see below), whose sum is σ = 3338536320. Its totient is φ = 357696000.

The previous prime is 1278770917. The next prime is 1278770953. The reversal of 1278770922 is 2290778721.

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 31 ways as a sum of consecutive naturals, for example, 75079 + ... + 90522.

It is an arithmetic number, because the mean of its divisors is an integer number (52164630).

Almost surely, 2^1278770922 is an apocalyptic number.

1278770922 is an abundant number, since it is smaller than the sum of its proper divisors (2059765398).

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

1278770922 is a wasteful number, since it uses less digits than its factorization.

1278770922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165636 (or 165630 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 45.

The square root of 1278770922 is about 35759.9066273949. The cubic root of 1278770922 is about 1085.4194112858.

The spelling of 1278770922 in words is "one billion, two hundred seventy-eight million, seven hundred seventy thousand, nine hundred twenty-two".