129394770 has 32 divisors (see below), whose sum is σ = 318124800. Its totient is φ = 33663360.

The previous prime is 129394747. The next prime is 129394777. The reversal of 129394770 is 77493921.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129394777) 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, 51370 + ... + 53829.

It is an arithmetic number, because the mean of its divisors is an integer number (9941400).

Almost surely, 2^129394770 is an apocalyptic number.

129394770 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129394770 is an abundant number, since it is smaller than the sum of its proper divisors (188730030).

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

129394770 is a wasteful number, since it uses less digits than its factorization.

129394770 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105250.

The product of its (nonzero) digits is 95256, while the sum is 42.

The square root of 129394770 is about 11375.1821963431. The cubic root of 129394770 is about 505.7923319946.

The spelling of 129394770 in words is "one hundred twenty-nine million, three hundred ninety-four thousand, seven hundred seventy".