129796398 has 32 divisors (see below), whose sum is σ = 288837120. Its totient is φ = 43205400.

The previous prime is 129796397. The next prime is 129796423. The reversal of 129796398 is 893697921.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129796397) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55611 + ... + 57897.

It is an arithmetic number, because the mean of its divisors is an integer number (9026160).

Almost surely, 2^129796398 is an apocalyptic number.

129796398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129796398 is an abundant number, since it is smaller than the sum of its proper divisors (159040722).

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

129796398 is a wasteful number, since it uses less digits than its factorization.

129796398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3349 (or 3343 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 129796398 is about 11392.8222140083. The cubic root of 129796398 is about 506.3151005444.

The spelling of 129796398 in words is "one hundred twenty-nine million, seven hundred ninety-six thousand, three hundred ninety-eight".