129293620 has 48 divisors (see below), whose sum is σ = 276756480. Its totient is φ = 50730624.

The previous prime is 129293617. The next prime is 129293641. The reversal of 129293620 is 26392921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 276627 + ... + 277093.

It is an arithmetic number, because the mean of its divisors is an integer number (5765760).

Almost surely, 2^129293620 is an apocalyptic number.

129293620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129293620 is an abundant number, since it is smaller than the sum of its proper divisors (147462860).

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

129293620 is a wasteful number, since it uses less digits than its factorization.

129293620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 712 (or 710 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 129293620 is about 11370.7352444774. The cubic root of 129293620 is about 505.6605022684.

The spelling of 129293620 in words is "one hundred twenty-nine million, two hundred ninety-three thousand, six hundred twenty".