129557190 has 64 divisors (see below), whose sum is σ = 359686656. Its totient is φ = 29252352.

The previous prime is 129557173. The next prime is 129557191. The reversal of 129557190 is 91755921.

It is a super-2 number, since 2×129557190² = 33570130961392200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129557191) 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, 13714 + ... + 21146.

It is an arithmetic number, because the mean of its divisors is an integer number (5620104).

Almost surely, 2^129557190 is an apocalyptic number.

129557190 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 129557190, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (179843328).

129557190 is an abundant number, since it is smaller than the sum of its proper divisors (230129466).

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

129557190 is a wasteful number, since it uses less digits than its factorization.

129557190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7533.

The product of its (nonzero) digits is 28350, while the sum is 39.

The square root of 129557190 is about 11382.3191837165. The cubic root of 129557190 is about 506.0038718217.

It can be divided in two parts, 1295 and 57190, that added together give a palindrome (58485).

The spelling of 129557190 in words is "one hundred twenty-nine million, five hundred fifty-seven thousand, one hundred ninety".