1278008226 has 64 divisors (see below), whose sum is σ = 3140749440. Its totient is φ = 381957120.

The previous prime is 1278008219. The next prime is 1278008233. The reversal of 1278008226 is 6228008721.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1278008219) and next prime (1278008233).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28626 + ... + 58098.

It is an arithmetic number, because the mean of its divisors is an integer number (49074210).

Almost surely, 2^1278008226 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278008226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1570374720).

1278008226 is an abundant number, since it is smaller than the sum of its proper divisors (1862741214).

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

1278008226 is a wasteful number, since it uses less digits than its factorization.

1278008226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29568 (or 29562 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 1278008226 is about 35749.2409150180. The cubic root of 1278008226 is about 1085.2035765163.

The spelling of 1278008226 in words is "one billion, two hundred seventy-eight million, eight thousand, two hundred twenty-six".