129191448 has 32 divisors (see below), whose sum is σ = 324016560. Its totient is φ = 42925440.

The previous prime is 129191441. The next prime is 129191453. The reversal of 129191448 is 844191921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129191441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 883 + ... + 16098.

Almost surely, 2^129191448 is an apocalyptic number.

It is an amenable number.

129191448 is an abundant number, since it is smaller than the sum of its proper divisors (194825112).

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

129191448 is a wasteful number, since it uses less digits than its factorization.

129191448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17307 (or 17303 counting only the distinct ones).

The product of its digits is 20736, while the sum is 39.

The square root of 129191448 is about 11366.2415951800. The cubic root of 129191448 is about 505.5272707402.

The spelling of 129191448 in words is "one hundred twenty-nine million, one hundred ninety-one thousand, four hundred forty-eight".