129063720 has 32 divisors (see below), whose sum is σ = 387191520. Its totient is φ = 34416960.

The previous prime is 129063719. The next prime is 129063743. The reversal of 129063720 is 27360921.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 537646 + ... + 537885.

It is an arithmetic number, because the mean of its divisors is an integer number (12099735).

Almost surely, 2^129063720 is an apocalyptic number.

129063720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129063720 is an abundant number, since it is smaller than the sum of its proper divisors (258127800).

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

129063720 is a wasteful number, since it uses less digits than its factorization.

129063720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075545 (or 1075541 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 129063720 is about 11360.6214618743. The cubic root of 129063720 is about 505.3606155437.

The spelling of 129063720 in words is "one hundred twenty-nine million, sixty-three thousand, seven hundred twenty".