129043998 has 24 divisors (see below), whose sum is σ = 283428288. Its totient is φ = 42424992.

The previous prime is 129043949. The next prime is 129044009. The reversal of 129043998 is 899340921.

129043998 is a `hidden beast` number, since 129 + 0 + 439 + 98 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 47790 + ... + 50417.

It is an arithmetic number, because the mean of its divisors is an integer number (11809512).

Almost surely, 2^129043998 is an apocalyptic number.

129043998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129043998 is an abundant number, since it is smaller than the sum of its proper divisors (154384290).

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

129043998 is a wasteful number, since it uses less digits than its factorization.

129043998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98288 (or 98285 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 129043998 is about 11359.7534304227. The cubic root of 129043998 is about 505.3348731436.

The spelling of 129043998 in words is "one hundred twenty-nine million, forty-three thousand, nine hundred ninety-eight".