128553420 has 24 divisors (see below), whose sum is σ = 359949744. Its totient is φ = 34280896.

The previous prime is 128553419. The next prime is 128553431. The reversal of 128553420 is 24355821.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 1071219 + ... + 1071338.

It is an arithmetic number, because the mean of its divisors is an integer number (14997906).

Almost surely, 2^128553420 is an apocalyptic number.

128553420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128553420 is an abundant number, since it is smaller than the sum of its proper divisors (231396324).

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

128553420 is a wasteful number, since it uses less digits than its factorization.

128553420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2142569 (or 2142567 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 128553420 is about 11338.1400591102. The cubic root of 128553420 is about 504.6936939336.

The spelling of 128553420 in words is "one hundred twenty-eight million, five hundred fifty-three thousand, four hundred twenty".