129234528 has 120 divisors (see below), whose sum is σ = 385845768. Its totient is φ = 42425856.

The previous prime is 129234467. The next prime is 129234529. The reversal of 129234528 is 825432921.

It is a happy number.

129234528 is a `hidden beast` number, since 1 + 292 + 345 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 129234492 and 129234501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129234529) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 188875 + ... + 189557.

Almost surely, 2^129234528 is an apocalyptic number.

129234528 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129234528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (192922884).

129234528 is an abundant number, since it is smaller than the sum of its proper divisors (256611240).

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

129234528 is an equidigital number, since it uses as much as digits as its factorization.

129234528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 778 (or 761 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 129234528 is about 11368.1365227552. The cubic root of 129234528 is about 505.5834553017.

The spelling of 129234528 in words is "one hundred twenty-nine million, two hundred thirty-four thousand, five hundred twenty-eight".