129031470 has 96 divisors (see below), whose sum is σ = 359218080. Its totient is φ = 32037120.

The previous prime is 129031457. The next prime is 129031471. The reversal of 129031470 is 74130921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129031471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 103692 + ... + 104928.

It is an arithmetic number, because the mean of its divisors is an integer number (3741855).

Almost surely, 2^129031470 is an apocalyptic number.

129031470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129031470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179609040).

129031470 is an abundant number, since it is smaller than the sum of its proper divisors (230186610).

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

129031470 is a wasteful number, since it uses less digits than its factorization.

129031470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1330 (or 1327 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 129031470 is about 11359.2019966193. The cubic root of 129031470 is about 505.3185194444.

The spelling of 129031470 in words is "one hundred twenty-nine million, thirty-one thousand, four hundred seventy".