129783290 has 32 divisors (see below), whose sum is σ = 287521920. Its totient is φ = 41073984.

The previous prime is 129783289. The next prime is 129783337. The reversal of 129783290 is 92387921.

It is a happy number.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

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, 70400 + ... + 72219.

It is an arithmetic number, because the mean of its divisors is an integer number (8985060).

Almost surely, 2^129783290 is an apocalyptic number.

129783290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129783290 is an abundant number, since it is smaller than the sum of its proper divisors (157738630).

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

129783290 is a wasteful number, since it uses less digits than its factorization.

129783290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142646.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 129783290 is about 11392.2469249925. The cubic root of 129783290 is about 506.2980558964.

The spelling of 129783290 in words is "one hundred twenty-nine million, seven hundred eighty-three thousand, two hundred ninety".