129892940 has 48 divisors (see below), whose sum is σ = 281649312. Its totient is φ = 50282496.

The previous prime is 129892927. The next prime is 129892951. The reversal of 129892940 is 49298921.

It is a junction number, because it is equal to n+sod(n) for n = 129892891 and 129892900.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 189839 + ... + 190521.

It is an arithmetic number, because the mean of its divisors is an integer number (5867694).

Almost surely, 2^129892940 is an apocalyptic number.

129892940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129892940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (140824656).

129892940 is an abundant number, since it is smaller than the sum of its proper divisors (151756372).

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

129892940 is a wasteful number, since it uses less digits than its factorization.

129892940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 986 (or 984 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 129892940 is about 11397.0583924099. The cubic root of 129892940 is about 506.4406010954.

The spelling of 129892940 in words is "one hundred twenty-nine million, eight hundred ninety-two thousand, nine hundred forty".