128646470240 has 24 divisors (see below), whose sum is σ = 303927286320. Its totient is φ = 51458588032.

The previous prime is 128646470209. The next prime is 128646470299. The reversal of 128646470240 is 42074646821.

128646470240 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×128646470240² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 128646470191 and 128646470200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 402020060 + ... + 402020379.

It is an arithmetic number, because the mean of its divisors is an integer number (12663636930).

Almost surely, 2^128646470240 is an apocalyptic number.

128646470240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128646470240 is an abundant number, since it is smaller than the sum of its proper divisors (175280816080).

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

128646470240 is an equidigital number, since it uses as much as digits as its factorization.

128646470240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804040454 (or 804040446 counting only the distinct ones).

The product of its (nonzero) digits is 516096, while the sum is 44.

The spelling of 128646470240 in words is "one hundred twenty-eight billion, six hundred forty-six million, four hundred seventy thousand, two hundred forty".