129920230 has 16 divisors (see below), whose sum is σ = 255116304. Its totient is φ = 47243680.

The previous prime is 129920221. The next prime is 129920257. The reversal of 129920230 is 32029921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 590437 + ... + 590656.

It is an arithmetic number, because the mean of its divisors is an integer number (15944769).

Almost surely, 2^129920230 is an apocalyptic number.

129920230 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129920230 is a deficient number, since it is larger than the sum of its proper divisors (125196074).

129920230 is a wasteful number, since it uses less digits than its factorization.

129920230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1181111.

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 129920230 is about 11398.2555682876. The cubic root of 129920230 is about 506.4760656767.

The spelling of 129920230 in words is "one hundred twenty-nine million, nine hundred twenty thousand, two hundred thirty".