128450420 has 24 divisors (see below), whose sum is σ = 308281344. Its totient is φ = 44040096.

The previous prime is 128450401. The next prime is 128450461. The reversal of 128450420 is 24054821.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 128450420.

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, 458612 + ... + 458891.

It is an arithmetic number, because the mean of its divisors is an integer number (12845056).

Almost surely, 2^128450420 is an apocalyptic number.

128450420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

128450420 is an abundant number, since it is smaller than the sum of its proper divisors (179830924).

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

128450420 is a wasteful number, since it uses less digits than its factorization.

128450420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917519 (or 917517 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 26.

The square root of 128450420 is about 11333.5969577182. The cubic root of 128450420 is about 504.5588671301.

The spelling of 128450420 in words is "one hundred twenty-eight million, four hundred fifty thousand, four hundred twenty".