128485540 has 12 divisors (see below), whose sum is σ = 269819676. Its totient is φ = 51394208.

The previous prime is 128485537. The next prime is 128485547. The reversal of 128485540 is 45584821.

It can be written as a sum of positive squares in 2 ways, for example, as 77334436 + 51151104 = 8794^2 + 7152^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 128485540.

It is not an unprimeable number, because it can be changed into a prime (128485547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3212119 + ... + 3212158.

It is an arithmetic number, because the mean of its divisors is an integer number (22484973).

Almost surely, 2^128485540 is an apocalyptic number.

128485540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128485540 is an abundant number, since it is smaller than the sum of its proper divisors (141334136).

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

128485540 is a wasteful number, since it uses less digits than its factorization.

128485540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6424286 (or 6424284 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 37.

The square root of 128485540 is about 11335.1462275526. The cubic root of 128485540 is about 504.6048472385.

The spelling of 128485540 in words is "one hundred twenty-eight million, four hundred eighty-five thousand, five hundred forty".