129629648 has 20 divisors (see below), whose sum is σ = 257946660. Its totient is φ = 63062784.

The previous prime is 129629603. The next prime is 129629651. The reversal of 129629648 is 846926921.

It can be written as a sum of positive squares in 2 ways, for example, as 81577024 + 48052624 = 9032^2 + 6932^2 .

It is a hoax number, since the sum of its digits (47) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108893 + ... + 110076.

It is an arithmetic number, because the mean of its divisors is an integer number (12897333).

Almost surely, 2^129629648 is an apocalyptic number.

It is an amenable number.

129629648 is a deficient number, since it is larger than the sum of its proper divisors (128317012).

129629648 is a wasteful number, since it uses less digits than its factorization.

129629648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219014 (or 219008 counting only the distinct ones).

The product of its digits is 373248, while the sum is 47.

The square root of 129629648 is about 11385.5016578103. The cubic root of 129629648 is about 506.0981858864.

The spelling of 129629648 in words is "one hundred twenty-nine million, six hundred twenty-nine thousand, six hundred forty-eight".