129898810 has 8 divisors (see below), whose sum is σ = 233817876. Its totient is φ = 51959520.

The previous prime is 129898789. The next prime is 129898841. The reversal of 129898810 is 18898921.

It can be written as a sum of positive squares in 2 ways, for example, as 128527569 + 1371241 = 11337^2 + 1171^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×129898810² = 33747401678832200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6494931 + ... + 6494950.

Almost surely, 2^129898810 is an apocalyptic number.

129898810 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129898810 is a deficient number, since it is larger than the sum of its proper divisors (103919066).

129898810 is a wasteful number, since it uses less digits than its factorization.

129898810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12989888.

The product of its (nonzero) digits is 82944, while the sum is 46.

The square root of 129898810 is about 11397.3159120909. The cubic root of 129898810 is about 506.4482298434.

The spelling of 129898810 in words is "one hundred twenty-nine million, eight hundred ninety-eight thousand, eight hundred ten".