129927472 has 40 divisors (see below), whose sum is σ = 268980800. Its totient is φ = 60616512.

The previous prime is 129927449. The next prime is 129927487. The reversal of 129927472 is 274729921.

It is a super-2 number, since 2×129927472² = 33762295960621568, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17179 + ... + 23557.

It is an arithmetic number, because the mean of its divisors is an integer number (6724520).

Almost surely, 2^129927472 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 129927472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (134490400).

129927472 is an abundant number, since it is smaller than the sum of its proper divisors (139053328).

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

129927472 is a wasteful number, since it uses less digits than its factorization.

129927472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6473 (or 6467 counting only the distinct ones).

The product of its digits is 127008, while the sum is 43.

The square root of 129927472 is about 11398.5732440512. The cubic root of 129927472 is about 506.4854761473.

The spelling of 129927472 in words is "one hundred twenty-nine million, nine hundred twenty-seven thousand, four hundred seventy-two".