129916400 has 30 divisors (see below), whose sum is σ = 312125112. Its totient is φ = 51966400.

The previous prime is 129916399. The next prime is 129916403. The reversal of 129916400 is 4619921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129916403) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 161996 + ... + 162795.

Almost surely, 2^129916400 is an apocalyptic number.

129916400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129916400 is an abundant number, since it is smaller than the sum of its proper divisors (182208712).

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

129916400 is a wasteful number, since it uses less digits than its factorization.

129916400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324809 (or 324798 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 129916400 is about 11398.0875588846. The cubic root of 129916400 is about 506.4710887192.

It can be divided in two parts, 12991 and 6400, that added together give a palindrome (19391).

The spelling of 129916400 in words is "one hundred twenty-nine million, nine hundred sixteen thousand, four hundred".