129872890 has 16 divisors (see below), whose sum is σ = 267167232. Its totient is φ = 44527824.

The previous prime is 129872887. The next prime is 129872903. The reversal of 129872890 is 98278921.

It is a self number, because there is not a number n which added to its sum of digits gives 129872890.

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, 927594 + ... + 927733.

It is an arithmetic number, because the mean of its divisors is an integer number (16697952).

Almost surely, 2^129872890 is an apocalyptic number.

129872890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129872890 is an abundant number, since it is smaller than the sum of its proper divisors (137294342).

129872890 is a wasteful number, since it uses less digits than its factorization.

129872890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1855341.

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 129872890 is about 11396.1787455269. The cubic root of 129872890 is about 506.4145420538.

The spelling of 129872890 in words is "one hundred twenty-nine million, eight hundred seventy-two thousand, eight hundred ninety".