128488545 has 32 divisors (see below), whose sum is σ = 240451200. Its totient is φ = 64919232.

The previous prime is 128488543. The next prime is 128488561. The reversal of 128488545 is 545884821.

128488545 is a `hidden beast` number, since 1 + 28 + 4 + 88 + 545 = 666.

It is not a de Polignac number, because 128488545 - 2¹ = 128488543 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 128488545.

It is not an unprimeable number, because it can be changed into a prime (128488543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 22482 + ... + 27611.

It is an arithmetic number, because the mean of its divisors is an integer number (7514100).

Almost surely, 2^128488545 is an apocalyptic number.

128488545 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128488545 is a deficient number, since it is larger than the sum of its proper divisors (111962655).

128488545 is a wasteful number, since it uses less digits than its factorization.

128488545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50126 (or 50120 counting only the distinct ones).

The product of its digits is 409600, while the sum is 45.

The square root of 128488545 is about 11335.2787791038. The cubic root of 128488545 is about 504.6087810812.

The spelling of 128488545 in words is "one hundred twenty-eight million, four hundred eighty-eight thousand, five hundred forty-five".