129074040 has 64 divisors (see below), whose sum is σ = 430250400. Its totient is φ = 34419456.

The previous prime is 129074021. The next prime is 129074051. The reversal of 129074040 is 40470921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 129073995 and 129074013.

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, 58677 + ... + 60836.

Almost surely, 2^129074040 is an apocalyptic number.

129074040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129074040 is an abundant number, since it is smaller than the sum of its proper divisors (301176360).

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

129074040 is a wasteful number, since it uses less digits than its factorization.

129074040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119533 (or 119523 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 129074040 is about 11361.0756532997. The cubic root of 129074040 is about 505.3740848144.

The spelling of 129074040 in words is "one hundred twenty-nine million, seventy-four thousand, forty".