129320416 has 24 divisors (see below), whose sum is σ = 255331440. Its totient is φ = 64474368.

The previous prime is 129320407. The next prime is 129320447. The reversal of 129320416 is 614023921.

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, 5860 + ... + 17116.

It is an arithmetic number, because the mean of its divisors is an integer number (10638810).

Almost surely, 2^129320416 is an apocalyptic number.

129320416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129320416 is a deficient number, since it is larger than the sum of its proper divisors (126011024).

129320416 is a wasteful number, since it uses less digits than its factorization.

129320416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11626 (or 11618 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 129320416 is about 11371.9134713556. The cubic root of 129320416 is about 505.6954324346.

The spelling of 129320416 in words is "one hundred twenty-nine million, three hundred twenty thousand, four hundred sixteen".