129751830 has 48 divisors (see below), whose sum is σ = 363308400. Its totient is φ = 31938624.

The previous prime is 129751823. The next prime is 129751849. The reversal of 129751830 is 38157921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54280 + ... + 56619.

It is an arithmetic number, because the mean of its divisors is an integer number (7568925).

Almost surely, 2^129751830 is an apocalyptic number.

129751830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129751830 is an abundant number, since it is smaller than the sum of its proper divisors (233556570).

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

129751830 is a wasteful number, since it uses less digits than its factorization.

129751830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110925 (or 110922 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 36.

The square root of 129751830 is about 11390.8660776958. The cubic root of 129751830 is about 506.2571430176.

The spelling of 129751830 in words is "one hundred twenty-nine million, seven hundred fifty-one thousand, eight hundred thirty".