1229976678 has 16 divisors (see below), whose sum is σ = 2811375360. Its totient is φ = 351421896.

The previous prime is 1229976619. The next prime is 1229976689. The reversal of 1229976678 is 8766799221.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14642538 + ... + 14642621.

It is an arithmetic number, because the mean of its divisors is an integer number (175710960).

Almost surely, 2^1229976678 is an apocalyptic number.

1229976678 is an abundant number, since it is smaller than the sum of its proper divisors (1581398682).

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

1229976678 is a wasteful number, since it uses less digits than its factorization.

1229976678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29285171.

The product of its digits is 4572288, while the sum is 57.

The square root of 1229976678 is about 35071.0233383630. The cubic root of 1229976678 is about 1071.4344977907.

The spelling of 1229976678 in words is "one billion, two hundred twenty-nine million, nine hundred seventy-six thousand, six hundred seventy-eight".