129765880 has 16 divisors (see below), whose sum is σ = 291973320. Its totient is φ = 51906336.

The previous prime is 129765863. The next prime is 129765893. The reversal of 129765880 is 88567921.

It is a super-2 number, since 2×129765880² = 33678367224348800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129765880.

It is a congruent number.

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, 1622034 + ... + 1622113.

Almost surely, 2^129765880 is an apocalyptic number.

129765880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129765880 is an abundant number, since it is smaller than the sum of its proper divisors (162207440).

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

129765880 is a wasteful number, since it uses less digits than its factorization.

129765880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3244158 (or 3244154 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 46.

The square root of 129765880 is about 11391.4827832025. The cubic root of 129765880 is about 506.2754154796.

The spelling of 129765880 in words is "one hundred twenty-nine million, seven hundred sixty-five thousand, eight hundred eighty".