129810988 has 24 divisors (see below), whose sum is σ = 238775040. Its totient is φ = 61630800.

The previous prime is 129810973. The next prime is 129811007. The reversal of 129810988 is 889018921.

It is a super-2 number, since 2×129810988² = 33701785211072288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7713 + ... + 17863.

It is an arithmetic number, because the mean of its divisors is an integer number (9948960).

Almost surely, 2^129810988 is an apocalyptic number.

It is an amenable number.

129810988 is a deficient number, since it is larger than the sum of its proper divisors (108964052).

129810988 is a wasteful number, since it uses less digits than its factorization.

129810988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10317 (or 10315 counting only the distinct ones).

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

The square root of 129810988 is about 11393.4625114581. The cubic root of 129810988 is about 506.3340709233.

The spelling of 129810988 in words is "one hundred twenty-nine million, eight hundred ten thousand, nine hundred eighty-eight".