129328390620 has 288 divisors, whose sum is σ = 462966626304. Its totient is φ = 28809561600.

The previous prime is 129328390603. The next prime is 129328390621. The reversal of 129328390620 is 26093823921.

It is a happy number.

129328390620 is a `hidden beast` number, since 12 + 9 + 3 + 2 + 8 + 3 + 9 + 0 + 620 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129328390621) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 5728755 + ... + 5751285.

It is an arithmetic number, because the mean of its divisors is an integer number (1607523008).

Almost surely, 2^129328390620 is an apocalyptic number.

129328390620 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 129328390620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231483313152).

129328390620 is an abundant number, since it is smaller than the sum of its proper divisors (333638235684).

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

129328390620 is a wasteful number, since it uses less digits than its factorization.

129328390620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22793 (or 22788 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The spelling of 129328390620 in words is "one hundred twenty-nine billion, three hundred twenty-eight million, three hundred ninety thousand, six hundred twenty".