129855090 has 32 divisors (see below), whose sum is σ = 311953536. Its totient is φ = 34594560.

The previous prime is 129855083. The next prime is 129855109. The reversal of 129855090 is 90558921.

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, 55035 + ... + 57345.

It is an arithmetic number, because the mean of its divisors is an integer number (9748548).

Almost surely, 2^129855090 is an apocalyptic number.

129855090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129855090 is an abundant number, since it is smaller than the sum of its proper divisors (182098446).

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

129855090 is a wasteful number, since it uses less digits than its factorization.

129855090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4194.

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 129855090 is about 11395.3977552343. The cubic root of 129855090 is about 506.3914050961.

The spelling of 129855090 in words is "one hundred twenty-nine million, eight hundred fifty-five thousand, ninety".