1229398868 has 24 divisors (see below), whose sum is σ = 2240528640. Its totient is φ = 589599360.

The previous prime is 1229398823. The next prime is 1229398873. The reversal of 1229398868 is 8688939221.

It is a super-2 number, since 2×1229398868² = 3022843153279362848, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 29858 + ... + 57881.

It is an arithmetic number, because the mean of its divisors is an integer number (93355360).

Almost surely, 2^1229398868 is an apocalyptic number.

It is an amenable number.

1229398868 is a deficient number, since it is larger than the sum of its proper divisors (1011129772).

1229398868 is a wasteful number, since it uses less digits than its factorization.

1229398868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87887 (or 87885 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 56.

The square root of 1229398868 is about 35062.7846583810. The cubic root of 1229398868 is about 1071.2666944638.

The spelling of 1229398868 in words is "one billion, two hundred twenty-nine million, three hundred ninety-eight thousand, eight hundred sixty-eight".