128045380 has 12 divisors (see below), whose sum is σ = 268895340. Its totient is φ = 51218144.

The previous prime is 128045363. The next prime is 128045381. The reversal of 128045380 is 83540821.

It can be written as a sum of positive squares in 2 ways, for example, as 100922116 + 27123264 = 10046^2 + 5208^2 .

It is not an unprimeable number, because it can be changed into a prime (128045381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3201115 + ... + 3201154.

It is an arithmetic number, because the mean of its divisors is an integer number (22407945).

Almost surely, 2^128045380 is an apocalyptic number.

128045380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128045380 is an abundant number, since it is smaller than the sum of its proper divisors (140849960).

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

128045380 is a wasteful number, since it uses less digits than its factorization.

128045380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6402278 (or 6402276 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 128045380 is about 11315.7138528685. The cubic root of 128045380 is about 504.0279704390.

The spelling of 128045380 in words is "one hundred twenty-eight million, forty-five thousand, three hundred eighty".