129336380 has 12 divisors (see below), whose sum is σ = 271606440. Its totient is φ = 51734544.

The previous prime is 129336373. The next prime is 129336407. The reversal of 129336380 is 83633921.

It is a self number, because there is not a number n which added to its sum of digits gives 129336380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3233390 + ... + 3233429.

It is an arithmetic number, because the mean of its divisors is an integer number (22633870).

Almost surely, 2^129336380 is an apocalyptic number.

129336380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129336380 is an abundant number, since it is smaller than the sum of its proper divisors (142270060).

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

129336380 is a wasteful number, since it uses less digits than its factorization.

129336380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6466828 (or 6466826 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 129336380 is about 11372.6153544380. The cubic root of 129336380 is about 505.7162401564.

It can be divided in two parts, 1293 and 36380, that added together give a palindrome (37673).

The spelling of 129336380 in words is "one hundred twenty-nine million, three hundred thirty-six thousand, three hundred eighty".