129290898 has 32 divisors (see below), whose sum is σ = 282765312. Its totient is φ = 39085200.

The previous prime is 129290891. The next prime is 129290947. The reversal of 129290898 is 898092921.

It is a super-2 number, since 2×129290898² = 33432272611292808, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129290891) 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, 28443 + ... + 32673.

It is an arithmetic number, because the mean of its divisors is an integer number (8836416).

Almost surely, 2^129290898 is an apocalyptic number.

129290898 is an abundant number, since it is smaller than the sum of its proper divisors (153474414).

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

129290898 is a wasteful number, since it uses less digits than its factorization.

129290898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4710.

The product of its (nonzero) digits is 186624, while the sum is 48.

The square root of 129290898 is about 11370.6155506199. The cubic root of 129290898 is about 505.6569537109.

The spelling of 129290898 in words is "one hundred twenty-nine million, two hundred ninety thousand, eight hundred ninety-eight".