129788828 has 24 divisors (see below), whose sum is σ = 245257152. Its totient is φ = 59742144.

The previous prime is 129788819. The next prime is 129788861. The reversal of 129788828 is 828887921.

129788828 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×129788828² = 33690279747227168, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129788828.

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, 17501 + ... + 23787.

It is an arithmetic number, because the mean of its divisors is an integer number (10219048).

Almost surely, 2^129788828 is an apocalyptic number.

It is an amenable number.

129788828 is a deficient number, since it is larger than the sum of its proper divisors (115468324).

129788828 is a wasteful number, since it uses less digits than its factorization.

129788828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6701 (or 6699 counting only the distinct ones).

The product of its digits is 1032192, while the sum is 53.

The square root of 129788828 is about 11392.4899824402. The cubic root of 129788828 is about 506.3052572312.

The spelling of 129788828 in words is "one hundred twenty-nine million, seven hundred eighty-eight thousand, eight hundred twenty-eight".