128772260 has 24 divisors (see below), whose sum is σ = 271143936. Its totient is φ = 51371360.

The previous prime is 128772251. The next prime is 128772271. The reversal of 128772260 is 62277821.

128772260 is nontrivially palindromic in base 3.

It is a self number, because there is not a number n which added to its sum of digits gives 128772260.

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, 746 + ... + 16065.

It is an arithmetic number, because the mean of its divisors is an integer number (11297664).

Almost surely, 2^128772260 is an apocalyptic number.

128772260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128772260 is an abundant number, since it is smaller than the sum of its proper divisors (142371676).

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

128772260 is a wasteful number, since it uses less digits than its factorization.

128772260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17203 (or 17201 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 128772260 is about 11347.7865683137. The cubic root of 128772260 is about 504.9799162029.

The spelling of 128772260 in words is "one hundred twenty-eight million, seven hundred seventy-two thousand, two hundred sixty".