128533420 has 24 divisors (see below), whose sum is σ = 270396000. Its totient is φ = 51322752.

The previous prime is 128533417. The next prime is 128533421. The reversal of 128533420 is 24335821.

It is not an unprimeable number, because it can be changed into a prime (128533421) 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, 6616 + ... + 17344.

It is an arithmetic number, because the mean of its divisors is an integer number (11266500).

Almost surely, 2^128533420 is an apocalyptic number.

128533420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128533420 is an abundant number, since it is smaller than the sum of its proper divisors (141862580).

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

128533420 is a wasteful number, since it uses less digits than its factorization.

128533420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11337 (or 11335 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 128533420 is about 11337.2580459298. The cubic root of 128533420 is about 504.6675196076.

The spelling of 128533420 in words is "one hundred twenty-eight million, five hundred thirty-three thousand, four hundred twenty".