129727864 has 32 divisors (see below), whose sum is σ = 279331200. Its totient is φ = 55329120.

The previous prime is 129727841. The next prime is 129727909. The reversal of 129727864 is 468727921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6327 + ... + 17305.

It is an arithmetic number, because the mean of its divisors is an integer number (8729100).

Almost surely, 2^129727864 is an apocalyptic number.

129727864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

129727864 is an abundant number, since it is smaller than the sum of its proper divisors (149603336).

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

129727864 is a wasteful number, since it uses less digits than its factorization.

129727864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11203 (or 11199 counting only the distinct ones).

The product of its digits is 338688, while the sum is 46.

The square root of 129727864 is about 11389.8140458921. The cubic root of 129727864 is about 506.2259714450.

It can be divided in two parts, 1297 and 27864, that added together give a triangular number (29161 = T₂₄₁).

The spelling of 129727864 in words is "one hundred twenty-nine million, seven hundred twenty-seven thousand, eight hundred sixty-four".