129621344 has 24 divisors (see below), whose sum is σ = 268624440. Its totient is φ = 61399296.

The previous prime is 129621343. The next prime is 129621367. The reversal of 129621344 is 443126921.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a self number, because there is not a number n which added to its sum of digits gives 129621344.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129621341) 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, 105989 + ... + 107204.

It is an arithmetic number, because the mean of its divisors is an integer number (11192685).

Almost surely, 2^129621344 is an apocalyptic number.

It is an amenable number.

129621344 is an abundant number, since it is smaller than the sum of its proper divisors (139003096).

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

129621344 is a wasteful number, since it uses less digits than its factorization.

129621344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213222 (or 213214 counting only the distinct ones).

The product of its digits is 10368, while the sum is 32.

The square root of 129621344 is about 11385.1369776564. The cubic root of 129621344 is about 506.0873788703.

The spelling of 129621344 in words is "one hundred twenty-nine million, six hundred twenty-one thousand, three hundred forty-four".