129397590 has 96 divisors (see below), whose sum is σ = 386358336. Its totient is φ = 29433600.

The previous prime is 129397579. The next prime is 129397603. The reversal of 129397590 is 95793921.

It is a happy number.

129397590 is a `hidden beast` number, since 1 + 29 + 39 + 7 + 590 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184240 + ... + 184940.

It is an arithmetic number, because the mean of its divisors is an integer number (4024566).

Almost surely, 2^129397590 is an apocalyptic number.

129397590 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 129397590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193179168).

129397590 is an abundant number, since it is smaller than the sum of its proper divisors (256960746).

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

129397590 is a wasteful number, since it uses less digits than its factorization.

129397590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1014 (or 1011 counting only the distinct ones).

The product of its (nonzero) digits is 153090, while the sum is 45.

The square root of 129397590 is about 11375.3061497263. The cubic root of 129397590 is about 505.7960063420.

The spelling of 129397590 in words is "one hundred twenty-nine million, three hundred ninety-seven thousand, five hundred ninety".