129031446 has 8 divisors (see below), whose sum is σ = 258062904. Its totient is φ = 43010480.

The previous prime is 129031429. The next prime is 129031447. The reversal of 129031446 is 644130921.

It is a sphenic number, since it is the product of 3 distinct primes.

129031446 is an admirable number.

It is a super-2 number, since 2×129031446² = 33298228113701832, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129031447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10752615 + ... + 10752626.

It is an arithmetic number, because the mean of its divisors is an integer number (32257863).

Almost surely, 2^129031446 is an apocalyptic number.

129031446 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

129031446 is a wasteful number, since it uses less digits than its factorization.

129031446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21505246.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 129031446 is about 11359.2009402070. The cubic root of 129031446 is about 505.3184881144.

The spelling of 129031446 in words is "one hundred twenty-nine million, thirty-one thousand, four hundred forty-six".