1228355686 has 8 divisors (see below), whose sum is σ = 1842687000. Its totient is φ = 614126688.

The previous prime is 1228355683. The next prime is 1228355707. The reversal of 1228355686 is 6865538221.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228355683) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22545 + ... + 54451.

It is an arithmetic number, because the mean of its divisors is an integer number (230335875).

Almost surely, 2^1228355686 is an apocalyptic number.

1228355686 is a deficient number, since it is larger than the sum of its proper divisors (614331314).

1228355686 is a wasteful number, since it uses less digits than its factorization.

1228355686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51158.

The product of its digits is 691200, while the sum is 46.

The square root of 1228355686 is about 35047.9055864969. The cubic root of 1228355686 is about 1070.9636080270.

The spelling of 1228355686 in words is "one billion, two hundred twenty-eight million, three hundred fifty-five thousand, six hundred eighty-six".