129389370 has 64 divisors (see below), whose sum is σ = 347953536. Its totient is φ = 30516480.

The previous prime is 129389353. The next prime is 129389371. The reversal of 129389370 is 73983921.

It is not an unprimeable number, because it can be changed into a prime (129389371) 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, 6912 + ... + 17508.

It is an arithmetic number, because the mean of its divisors is an integer number (5436774).

Almost surely, 2^129389370 is an apocalyptic number.

129389370 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 129389370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173976768).

129389370 is an abundant number, since it is smaller than the sum of its proper divisors (218564166).

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

129389370 is a wasteful number, since it uses less digits than its factorization.

129389370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10655.

The product of its (nonzero) digits is 81648, while the sum is 42.

The square root of 129389370 is about 11374.9448350311. The cubic root of 129389370 is about 505.7852958612.

The spelling of 129389370 in words is "one hundred twenty-nine million, three hundred eighty-nine thousand, three hundred seventy".