1123390866 has 16 divisors (see below), whose sum is σ = 2419611264. Its totient is φ = 345658704.

The previous prime is 1123390861. The next prime is 1123390883. The reversal of 1123390866 is 6680933211.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (1123390861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7201146 + ... + 7201301.

It is an arithmetic number, because the mean of its divisors is an integer number (151225704).

Almost surely, 2^1123390866 is an apocalyptic number.

1123390866 is an abundant number, since it is smaller than the sum of its proper divisors (1296220398).

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

1123390866 is a wasteful number, since it uses less digits than its factorization.

1123390866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14402465.

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 1123390866 is about 33517.0235253669. The cubic root of 1123390866 is about 1039.5458032712.

The spelling of 1123390866 in words is "one billion, one hundred twenty-three million, three hundred ninety thousand, eight hundred sixty-six".