129224472 has 64 divisors (see below), whose sum is σ = 366240000. Its totient is φ = 37666944.

The previous prime is 129224423. The next prime is 129224477. The reversal of 129224472 is 274422921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129224477) 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, 4972 + ... + 16827.

It is an arithmetic number, because the mean of its divisors is an integer number (5722500).

Almost surely, 2^129224472 is an apocalyptic number.

129224472 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129224472 is an abundant number, since it is smaller than the sum of its proper divisors (237015528).

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

129224472 is a wasteful number, since it uses less digits than its factorization.

129224472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21840 (or 21836 counting only the distinct ones).

The product of its digits is 16128, while the sum is 33.

The square root of 129224472 is about 11367.6942253036. The cubic root of 129224472 is about 505.5703414712.

The spelling of 129224472 in words is "one hundred twenty-nine million, two hundred twenty-four thousand, four hundred seventy-two".