129470550 has 48 divisors (see below), whose sum is σ = 350281152. Its totient is φ = 31386400.

The previous prime is 129470533. The next prime is 129470557. The reversal of 129470550 is 55074921.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129470557) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 37584 + ... + 40883.

It is an arithmetic number, because the mean of its divisors is an integer number (7297524).

Almost surely, 2^129470550 is an apocalyptic number.

129470550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129470550 is an abundant number, since it is smaller than the sum of its proper divisors (220810602).

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

129470550 is a wasteful number, since it uses less digits than its factorization.

129470550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78493 (or 78488 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The square root of 129470550 is about 11378.5126444540. The cubic root of 129470550 is about 505.8910517571.

The spelling of 129470550 in words is "one hundred twenty-nine million, four hundred seventy thousand, five hundred fifty".