129672900 has 180 divisors, whose sum is σ = 480608128. Its totient is φ = 29626560.

The previous prime is 129672899. The next prime is 129672931. The reversal of 129672900 is 9276921.

It is a tau number, because it is divible by the number of its divisors (180).

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 55557 + ... + 57843.

Almost surely, 2^129672900 is an apocalyptic number.

129672900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129672900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (240304064).

129672900 is an abundant number, since it is smaller than the sum of its proper divisors (350935228).

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

129672900 is a wasteful number, since it uses less digits than its factorization.

129672900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320 (or 2304 counting only the distinct ones).

The product of its (nonzero) digits is 13608, while the sum is 36.

The square root of 129672900 is about 11387.4009326097. The cubic root of 129672900 is about 506.1544675703.

It can be divided in two parts, 1296 and 72900, that multiplied together give a square (94478400 = 9720²).

The spelling of 129672900 in words is "one hundred twenty-nine million, six hundred seventy-two thousand, nine hundred".