128253040 has 40 divisors (see below), whose sum is σ = 313886160. Its totient is φ = 48600576.

The previous prime is 128253029. The next prime is 128253131. The reversal of 128253040 is 40352821.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 128252996 and 128253014.

It is a congruent number.

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, 40669 + ... + 43708.

It is an arithmetic number, because the mean of its divisors is an integer number (7847154).

Almost surely, 2^128253040 is an apocalyptic number.

128253040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128253040 is an abundant number, since it is smaller than the sum of its proper divisors (185633120).

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

128253040 is a wasteful number, since it uses less digits than its factorization.

128253040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84409 (or 84403 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

The square root of 128253040 is about 11324.8858713896. The cubic root of 128253040 is about 504.3002955518.

The spelling of 128253040 in words is "one hundred twenty-eight million, two hundred fifty-three thousand, forty".