129527904 has 96 divisors (see below), whose sum is σ = 387120384. Its totient is φ = 37537280.

The previous prime is 129527903. The next prime is 129527971. The reversal of 129527904 is 409725921.

It is a tau number, because it is divible by the number of its divisors (96).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129527903) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21622 + ... + 26954.

It is an arithmetic number, because the mean of its divisors is an integer number (4032504).

Almost surely, 2^129527904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129527904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193560192).

129527904 is an abundant number, since it is smaller than the sum of its proper divisors (257592480).

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

129527904 is a wasteful number, since it uses less digits than its factorization.

129527904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380 (or 5372 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 129527904 is about 11381.0326420760. The cubic root of 129527904 is about 505.9657420812.

The spelling of 129527904 in words is "one hundred twenty-nine million, five hundred twenty-seven thousand, nine hundred four".