129774080 has 80 divisors (see below), whose sum is σ = 314069184. Its totient is φ = 51425280.

The previous prime is 129774079. The next prime is 129774173. The reversal of 129774080 is 80477921.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 417125 + ... + 417435.

Almost surely, 2^129774080 is an apocalyptic number.

129774080 is a gapful number since it is divisible by the number (10) 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 129774080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157034592).

129774080 is an abundant number, since it is smaller than the sum of its proper divisors (184295104).

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

129774080 is an equidigital number, since it uses as much as digits as its factorization.

129774080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 481 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 129774080 is about 11391.8426955432. The cubic root of 129774080 is about 506.2860792251.

The spelling of 129774080 in words is "one hundred twenty-nine million, seven hundred seventy-four thousand, eighty".