1278959428 has 24 divisors (see below), whose sum is σ = 2278387160. Its totient is φ = 628024320.

The previous prime is 1278959389. The next prime is 1278959431. The reversal of 1278959428 is 8249598721.

It can be written as a sum of positive squares in 4 ways, for example, as 112190464 + 1166768964 = 10592^2 + 34158^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 169300 + ... + 176692.

Almost surely, 2^1278959428 is an apocalyptic number.

It is an amenable number.

1278959428 is a deficient number, since it is larger than the sum of its proper divisors (999427732).

1278959428 is a wasteful number, since it uses less digits than its factorization.

1278959428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8167 (or 8165 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 55.

The square root of 1278959428 is about 35762.5422474410. The cubic root of 1278959428 is about 1085.4727432300.

The spelling of 1278959428 in words is "one billion, two hundred seventy-eight million, nine hundred fifty-nine thousand, four hundred twenty-eight".