129431088 has 80 divisors (see below), whose sum is σ = 378591840. Its totient is φ = 42322176.

The previous prime is 129431063. The next prime is 129431123. The reversal of 129431088 is 880134921.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20070 + ... + 25722.

It is an arithmetic number, because the mean of its divisors is an integer number (4732398).

Almost surely, 2^129431088 is an apocalyptic number.

129431088 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 129431088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189295920).

129431088 is an abundant number, since it is smaller than the sum of its proper divisors (249160752).

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

129431088 is a wasteful number, since it uses less digits than its factorization.

129431088 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723 (or 5711 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 129431088 is about 11376.7784543780. The cubic root of 129431088 is about 505.8396488157.

The spelling of 129431088 in words is "one hundred twenty-nine million, four hundred thirty-one thousand, eighty-eight".