129190220 has 12 divisors (see below), whose sum is σ = 271299504. Its totient is φ = 51676080.

The previous prime is 129190183. The next prime is 129190223. The reversal of 129190220 is 22091921.

It is a happy number.

It is a super-2 number, since 2×129190220² = 33380225887296800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129190220.

It is not an unprimeable number, because it can be changed into a prime (129190223) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3229736 + ... + 3229775.

It is an arithmetic number, because the mean of its divisors is an integer number (22608292).

Almost surely, 2^129190220 is an apocalyptic number.

129190220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129190220 is an abundant number, since it is smaller than the sum of its proper divisors (142109284).

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

129190220 is a wasteful number, since it uses less digits than its factorization.

129190220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6459520 (or 6459518 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 26.

The square root of 129190220 is about 11366.1875754362. The cubic root of 129190220 is about 505.5256690102.

The spelling of 129190220 in words is "one hundred twenty-nine million, one hundred ninety thousand, two hundred twenty".