129960402 has 64 divisors (see below), whose sum is σ = 307528704. Its totient is φ = 36095040.

The previous prime is 129960371. The next prime is 129960403. The reversal of 129960402 is 204069921.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (129960403) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 142833 + ... + 143739.

It is an arithmetic number, because the mean of its divisors is an integer number (4805136).

Almost surely, 2^129960402 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129960402, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153764352).

129960402 is an abundant number, since it is smaller than the sum of its proper divisors (177568302).

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

129960402 is a wasteful number, since it uses less digits than its factorization.

129960402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1103.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 129960402 is about 11400.0176315653. The cubic root of 129960402 is about 506.5282619611.

The spelling of 129960402 in words is "one hundred twenty-nine million, nine hundred sixty thousand, four hundred two".