129994410 has 128 divisors (see below), whose sum is σ = 406715904. Its totient is φ = 25804800.

The previous prime is 129994399. The next prime is 129994411. The reversal of 129994410 is 14499921.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129994411) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45010 + ... + 47810.

It is an arithmetic number, because the mean of its divisors is an integer number (3177468).

Almost surely, 2^129994410 is an apocalyptic number.

129994410 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 129994410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203357952).

129994410 is an abundant number, since it is smaller than the sum of its proper divisors (276721494).

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

129994410 is a wasteful number, since it uses less digits than its factorization.

129994410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2848.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 129994410 is about 11401.5091106397. The cubic root of 129994410 is about 506.5724408303.

The spelling of 129994410 in words is "one hundred twenty-nine million, nine hundred ninety-four thousand, four hundred ten".