129923950828 has 24 divisors (see below), whose sum is σ = 268230093824. Its totient is φ = 53885509200.

The previous prime is 129923950789. The next prime is 129923950837. The reversal of 129923950828 is 828059329921.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74840118 + ... + 74841853.

Almost surely, 2^129923950828 is an apocalyptic number.

It is an amenable number.

129923950828 is an abundant number, since it is smaller than the sum of its proper divisors (138306142996).

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

129923950828 is a wasteful number, since it uses less digits than its factorization.

129923950828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149682013 (or 149682011 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 58.

The spelling of 129923950828 in words is "one hundred twenty-nine billion, nine hundred twenty-three million, nine hundred fifty thousand, eight hundred twenty-eight".