129280632 has 32 divisors (see below), whose sum is σ = 348064080. Its totient is φ = 39778560.

The previous prime is 129280607. The next prime is 129280687. The reversal of 129280632 is 236082921.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 129280593 and 129280602.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 206869 + ... + 207492.

Almost surely, 2^129280632 is an apocalyptic number.

129280632 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

129280632 is an abundant number, since it is smaller than the sum of its proper divisors (218783448).

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

129280632 is a wasteful number, since it uses less digits than its factorization.

129280632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414383 (or 414379 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 129280632 is about 11370.1641149106. The cubic root of 129280632 is about 505.6435699080.

The spelling of 129280632 in words is "one hundred twenty-nine million, two hundred eighty thousand, six hundred thirty-two".