129403828 has 12 divisors (see below), whose sum is σ = 226583392. Its totient is φ = 64665720.

The previous prime is 129403801. The next prime is 129403849. The reversal of 129403828 is 828304921.

129403828 is a nontrivial binomial coefficient, being equal to C(16088, 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1 + ... + 16087.

Almost surely, 2^129403828 is an apocalyptic number.

129403828 is the 16087-th triangular number and also the 8044-th hexagonal number.

129403828 is the 5363-rd centered nonagonal number.

It is an amenable number.

129403828 is a deficient number, since it is larger than the sum of its proper divisors (97179564).

129403828 is a wasteful number, since it uses less digits than its factorization.

129403828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18102 (or 18100 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 129403828 is about 11375.5803368444. The cubic root of 129403828 is about 505.8041340173.

The spelling of 129403828 in words is "one hundred twenty-nine million, four hundred three thousand, eight hundred twenty-eight".