128485240 has 32 divisors (see below), whose sum is σ = 311330880. Its totient is φ = 47440512.

The previous prime is 128485237. The next prime is 128485249. The reversal of 128485240 is 42584821.

It is a junction number, because it is equal to n+sod(n) for n = 128485196 and 128485205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128485249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 123024 + ... + 124063.

It is an arithmetic number, because the mean of its divisors is an integer number (9729090).

Almost surely, 2^128485240 is an apocalyptic number.

128485240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128485240 is an abundant number, since it is smaller than the sum of its proper divisors (182845640).

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

128485240 is a wasteful number, since it uses less digits than its factorization.

128485240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247111 (or 247107 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 34.

The square root of 128485240 is about 11335.1329943676. The cubic root of 128485240 is about 504.6044545054.

The spelling of 128485240 in words is "one hundred twenty-eight million, four hundred eighty-five thousand, two hundred forty".