129040494 has 32 divisors (see below), whose sum is σ = 285410304. Its totient is φ = 38566080.

The previous prime is 129040453. The next prime is 129040519. The reversal of 129040494 is 494040921.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent 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, 8574 + ... + 18209.

It is an arithmetic number, because the mean of its divisors is an integer number (8919072).

Almost surely, 2^129040494 is an apocalyptic number.

129040494 is an abundant number, since it is smaller than the sum of its proper divisors (156369810).

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

129040494 is a wasteful number, since it uses less digits than its factorization.

129040494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26872.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 129040494 is about 11359.5992006761. The cubic root of 129040494 is about 505.3302992270.

The spelling of 129040494 in words is "one hundred twenty-nine million, forty thousand, four hundred ninety-four".