129757764 has 48 divisors (see below), whose sum is σ = 319988480. Its totient is φ = 40811040.

The previous prime is 129757729. The next prime is 129757777. The reversal of 129757764 is 467757921.

It is a happy 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, 63519 + ... + 65529.

Almost surely, 2^129757764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129757764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159994240).

129757764 is an abundant number, since it is smaller than the sum of its proper divisors (190230716).

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

129757764 is a wasteful number, since it uses less digits than its factorization.

129757764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2320 (or 2318 counting only the distinct ones).

The product of its digits is 740880, while the sum is 48.

The square root of 129757764 is about 11391.1265465712. The cubic root of 129757764 is about 506.2648605301.

The spelling of 129757764 in words is "one hundred twenty-nine million, seven hundred fifty-seven thousand, seven hundred sixty-four".