129998700 has 216 divisors, whose sum is σ = 451179456. Its totient is φ = 31104000.

The previous prime is 129998689. The next prime is 129998707. The reversal of 129998700 is 7899921.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (129998707) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 479565 + ... + 479835.

Almost surely, 2^129998700 is an apocalyptic number.

129998700 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 129998700, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (225589728).

129998700 is an abundant number, since it is smaller than the sum of its proper divisors (321180756).

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

129998700 is a wasteful number, since it uses less digits than its factorization.

129998700 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 345 (or 335 counting only the distinct ones).

The product of its (nonzero) digits is 81648, while the sum is 45.

The square root of 129998700 is about 11401.6972420776. The cubic root of 129998700 is about 506.5780133055.

It can be divided in two parts, 1299 and 98700, that added together give a palindrome (99999).

The spelling of 129998700 in words is "one hundred twenty-nine million, nine hundred ninety-eight thousand, seven hundred".