1228278616 has 16 divisors (see below), whose sum is σ = 2303483040. Its totient is φ = 614016480.

The previous prime is 1228278593. The next prime is 1228278647. The reversal of 1228278616 is 6168728221.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38086 + ... + 62506.

It is an arithmetic number, because the mean of its divisors is an integer number (143967690).

Almost surely, 2^1228278616 is an apocalyptic number.

It is an amenable number.

1228278616 is a deficient number, since it is larger than the sum of its proper divisors (1075204424).

1228278616 is a wasteful number, since it uses less digits than its factorization.

1228278616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30714 (or 30710 counting only the distinct ones).

The product of its digits is 129024, while the sum is 43.

The square root of 1228278616 is about 35046.8060741632. The cubic root of 1228278616 is about 1070.9412092782.

The spelling of 1228278616 in words is "one billion, two hundred twenty-eight million, two hundred seventy-eight thousand, six hundred sixteen".