129894632 has 32 divisors (see below), whose sum is σ = 280393920. Its totient is φ = 55259520.

The previous prime is 129894631. The next prime is 129894643. The reversal of 129894632 is 236498921.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (129894631) 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, 794 + ... + 16137.

It is an arithmetic number, because the mean of its divisors is an integer number (8762310).

Almost surely, 2^129894632 is an apocalyptic number.

It is an amenable number.

129894632 is an abundant number, since it is smaller than the sum of its proper divisors (150499288).

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

129894632 is a wasteful number, since it uses less digits than its factorization.

129894632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17081 (or 17077 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 129894632 is about 11397.1326218484. The cubic root of 129894632 is about 506.4428000698.

The spelling of 129894632 in words is "one hundred twenty-nine million, eight hundred ninety-four thousand, six hundred thirty-two".