129867660 has 288 divisors, whose sum is σ = 469647360. Its totient is φ = 28740096.

The previous prime is 129867659. The next prime is 129867671. The reversal of 129867660 is 66768921.

It is a super-2 number, since 2×129867660² = 33731218227751200, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1022517 + ... + 1022643.

It is an arithmetic number, because the mean of its divisors is an integer number (1630720).

Almost surely, 2^129867660 is an apocalyptic number.

129867660 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 129867660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (234823680).

129867660 is an abundant number, since it is smaller than the sum of its proper divisors (339779700).

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

129867660 is a wasteful number, since it uses less digits than its factorization.

129867660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197 (or 192 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 129867660 is about 11395.9492803364. The cubic root of 129867660 is about 506.4077441670.

The spelling of 129867660 in words is "one hundred twenty-nine million, eight hundred sixty-seven thousand, six hundred sixty".