129228190 has 48 divisors (see below), whose sum is σ = 291416832. Its totient is φ = 40896576.

The previous prime is 129228179. The next prime is 129228199. The reversal of 129228190 is 91822921.

It is a super-2 number, since 2×129228190² = 33399850181352200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129228199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3774 + ... + 16513.

It is an arithmetic number, because the mean of its divisors is an integer number (6071184).

Almost surely, 2^129228190 is an apocalyptic number.

129228190 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129228190 is an abundant number, since it is smaller than the sum of its proper divisors (162188642).

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

129228190 is a wasteful number, since it uses less digits than its factorization.

129228190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20321 (or 20314 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 34.

The square root of 129228190 is about 11367.8577577308. The cubic root of 129228190 is about 505.5751901206.

It can be divided in two parts, 12922 and 8190, that added together give a palindrome (21112).

The spelling of 129228190 in words is "one hundred twenty-nine million, two hundred twenty-eight thousand, one hundred ninety".