129718290 has 32 divisors (see below), whose sum is σ = 335272896. Its totient is φ = 31930560.

The previous prime is 129718289. The next prime is 129718307. The reversal of 129718290 is 92817921.

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

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165916 + ... + 166695.

It is an arithmetic number, because the mean of its divisors is an integer number (10477278).

Almost surely, 2^129718290 is an apocalyptic number.

129718290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129718290 is an abundant number, since it is smaller than the sum of its proper divisors (205554606).

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

129718290 is a wasteful number, since it uses less digits than its factorization.

129718290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332634.

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 129718290 is about 11389.3937503275. The cubic root of 129718290 is about 506.2135178710.

The spelling of 129718290 in words is "one hundred twenty-nine million, seven hundred eighteen thousand, two hundred ninety".