129464140 has 36 divisors (see below), whose sum is σ = 294404544. Its totient is φ = 47800896.

The previous prime is 129464131. The next prime is 129464141. The reversal of 129464140 is 41464921.

It is not an unprimeable number, because it can be changed into a prime (129464141) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15772 + ... + 22531.

It is an arithmetic number, because the mean of its divisors is an integer number (8177904).

Almost surely, 2^129464140 is an apocalyptic number.

129464140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129464140 is an abundant number, since it is smaller than the sum of its proper divisors (164940404).

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

129464140 is a wasteful number, since it uses less digits than its factorization.

129464140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38338 (or 38323 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 129464140 is about 11378.2309697070. The cubic root of 129464140 is about 505.8827028439.

The spelling of 129464140 in words is "one hundred twenty-nine million, four hundred sixty-four thousand, one hundred forty".