1228208278 has 16 divisors (see below), whose sum is σ = 2029698000. Its totient is φ = 552748000.

The previous prime is 1228208263. The next prime is 1228208291. The reversal of 1228208278 is 8728028221.

It is a self number, because there is not a number n which added to its sum of digits gives 1228208278.

It is a congruent number.

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, 274153 + ... + 278596.

It is an arithmetic number, because the mean of its divisors is an integer number (126856125).

Almost surely, 2^1228208278 is an apocalyptic number.

1228208278 is a deficient number, since it is larger than the sum of its proper divisors (801489722).

1228208278 is a wasteful number, since it uses less digits than its factorization.

1228208278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552863.

The product of its (nonzero) digits is 57344, while the sum is 40.

The square root of 1228208278 is about 35045.8025732041. The cubic root of 1228208278 is about 1070.9207662235.

The spelling of 1228208278 in words is "one billion, two hundred twenty-eight million, two hundred eight thousand, two hundred seventy-eight".