129993472 has 108 divisors (see below), whose sum is σ = 310144296. Its totient is φ = 54190080.

The previous prime is 129993439. The next prime is 129993481. The reversal of 129993472 is 274399921.

It is a happy number.

It is a super-2 number, since 2×129993472² = 33796605525229568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 539272 + ... + 539512.

Almost surely, 2^129993472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129993472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (155072148).

129993472 is an abundant number, since it is smaller than the sum of its proper divisors (180150824).

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

129993472 is an equidigital number, since it uses as much as digits as its factorization.

129993472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314 (or 293 counting only the distinct ones).

The product of its digits is 244944, while the sum is 46.

The square root of 129993472 is about 11401.4679756600. The cubic root of 129993472 is about 506.5712224033.

It can be divided in two parts, 12999 and 3472, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 129993472 in words is "one hundred twenty-nine million, nine hundred ninety-three thousand, four hundred seventy-two".