129649850 has 96 divisors (see below), whose sum is σ = 282946176. Its totient is φ = 43718400.

The previous prime is 129649847. The next prime is 129649853. The reversal of 129649850 is 58946921.

It is an interprime number because it is at equal distance from previous prime (129649847) and next prime (129649853).

It is not an unprimeable number, because it can be changed into a prime (129649853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 467912 + ... + 468188.

It is an arithmetic number, because the mean of its divisors is an integer number (2947356).

Almost surely, 2^129649850 is an apocalyptic number.

129649850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129649850 is an abundant number, since it is smaller than the sum of its proper divisors (153296326).

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

129649850 is a wasteful number, since it uses less digits than its factorization.

129649850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 355 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 44.

The square root of 129649850 is about 11386.3888041819. The cubic root of 129649850 is about 506.1244753056.

The spelling of 129649850 in words is "one hundred twenty-nine million, six hundred forty-nine thousand, eight hundred fifty".