129465990 has 96 divisors (see below), whose sum is σ = 345945600. Its totient is φ = 33583680.

The previous prime is 129465979. The next prime is 129466009. The reversal of 129465990 is 99564921.

129465990 is a `hidden beast` number, since 12 + 9 + 46 + 599 + 0 = 666.

It is a super-2 number, since 2×129465990² = 33522885133360200, which contains 22 as substring.

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

It is a congruent number.

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, 931341 + ... + 931479.

It is an arithmetic number, because the mean of its divisors is an integer number (3603600).

Almost surely, 2^129465990 is an apocalyptic number.

129465990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 129465990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172972800).

129465990 is an abundant number, since it is smaller than the sum of its proper divisors (216479610).

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

129465990 is a wasteful number, since it uses less digits than its factorization.

129465990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 129465990 is about 11378.3122650066. The cubic root of 129465990 is about 505.8851124649.

The spelling of 129465990 in words is "one hundred twenty-nine million, four hundred sixty-five thousand, nine hundred ninety".