129034738 has 72 divisors (see below), whose sum is σ = 249646320. Its totient is φ = 49729680.

The previous prime is 129034733. The next prime is 129034739. The reversal of 129034738 is 837430921.

It is a super-2 number, since 2×129034738² = 33299927221457288, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129034697 and 129034706.

It is not an unprimeable number, because it can be changed into a prime (129034733) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 984933 + ... + 985063.

It is an arithmetic number, because the mean of its divisors is an integer number (3467310).

Almost surely, 2^129034738 is an apocalyptic number.

129034738 is a deficient number, since it is larger than the sum of its proper divisors (120611582).

129034738 is a wasteful number, since it uses less digits than its factorization.

129034738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 37.

The square root of 129034738 is about 11359.3458438415. The cubic root of 129034738 is about 505.3227855018.

The spelling of 129034738 in words is "one hundred twenty-nine million, thirty-four thousand, seven hundred thirty-eight".