129439464 has 128 divisors (see below), whose sum is σ = 408499200. Its totient is φ = 33200640.

The previous prime is 129439463. The next prime is 129439481. The reversal of 129439464 is 464934921.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (129439463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 164079 + ... + 164865.

It is an arithmetic number, because the mean of its divisors is an integer number (3191400).

Almost surely, 2^129439464 is an apocalyptic number.

129439464 is a gapful number since it is divisible by the number (14) 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 129439464, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204249600).

129439464 is an abundant number, since it is smaller than the sum of its proper divisors (279059736).

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

129439464 is a wasteful number, since it uses less digits than its factorization.

129439464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 903 (or 899 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 129439464 is about 11377.1465666924. The cubic root of 129439464 is about 505.8505602116.

The spelling of 129439464 in words is "one hundred twenty-nine million, four hundred thirty-nine thousand, four hundred sixty-four".