129349056 has 112 divisors (see below), whose sum is σ = 378342144. Its totient is φ = 38793216.

The previous prime is 129349027. The next prime is 129349057. The reversal of 129349056 is 650943921.

It is a super-2 number, since 2×129349056² = 33462356576182272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129349057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 74211 + ... + 75933.

Almost surely, 2^129349056 is an apocalyptic number.

129349056 is a gapful number since it is divisible by the number (16) 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 129349056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (189171072).

129349056 is an abundant number, since it is smaller than the sum of its proper divisors (248993088).

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

129349056 is a wasteful number, since it uses less digits than its factorization.

129349056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1778 (or 1768 counting only the distinct ones).

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 129349056 is about 11373.1726444295. The cubic root of 129349056 is about 505.7327610292.

The spelling of 129349056 in words is "one hundred twenty-nine million, three hundred forty-nine thousand, fifty-six".