128068040 has 32 divisors (see below), whose sum is σ = 290002680. Its totient is φ = 50898432.

The previous prime is 128068027. The next prime is 128068069. The reversal of 128068040 is 40860821.

It can be written as a sum of positive squares in 4 ways, for example, as 93045316 + 35022724 = 9646^2 + 5918^2 .

It is a junction number, because it is equal to n+sod(n) for n = 128067994 and 128068012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3917 + ... + 16476.

Almost surely, 2^128068040 is an apocalyptic number.

128068040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128068040 is an abundant number, since it is smaller than the sum of its proper divisors (161934640).

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

128068040 is a wasteful number, since it uses less digits than its factorization.

128068040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20561 (or 20557 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 128068040 is about 11316.7150710796. The cubic root of 128068040 is about 504.0577010447.

The spelling of 128068040 in words is "one hundred twenty-eight million, sixty-eight thousand, forty".