128743752 has 32 divisors (see below), whose sum is σ = 322156800. Its totient is φ = 42874944.

The previous prime is 128743721. The next prime is 128743777. The reversal of 128743752 is 257347821.

It is a self number, because there is not a number n which added to its sum of digits gives 128743752.

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, 36649 + ... + 40007.

It is an arithmetic number, because the mean of its divisors is an integer number (10067400).

Almost surely, 2^128743752 is an apocalyptic number.

128743752 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128743752 is an abundant number, since it is smaller than the sum of its proper divisors (193413048).

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

128743752 is a wasteful number, since it uses less digits than its factorization.

128743752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4965 (or 4961 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 128743752 is about 11346.5303947947. The cubic root of 128743752 is about 504.9426487823.

The spelling of 128743752 in words is "one hundred twenty-eight million, seven hundred forty-three thousand, seven hundred fifty-two".