129890880 has 336 divisors, whose sum is σ = 542056320. Its totient is φ = 27869184.

The previous prime is 129890869. The next prime is 129890903. The reversal of 129890880 is 88098921.

It is a tau number, because it is divible by the number of its divisors (336).

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 47 ways as a sum of consecutive naturals, for example, 342531 + ... + 342909.

Almost surely, 2^129890880 is an apocalyptic number.

129890880 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 129890880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (271028160).

129890880 is an abundant number, since it is smaller than the sum of its proper divisors (412165440).

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

129890880 is a wasteful number, since it uses less digits than its factorization.

129890880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 413 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 45.

The square root of 129890880 is about 11396.9680178546. The cubic root of 129890880 is about 506.4379238312.

The spelling of 129890880 in words is "one hundred twenty-nine million, eight hundred ninety thousand, eight hundred eighty".