128450256 has 80 divisors (see below), whose sum is σ = 367500288. Its totient is φ = 38332800.

The previous prime is 128450243. The next prime is 128450263. The reversal of 128450256 is 652054821.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33561 + ... + 37191.

Almost surely, 2^128450256 is an apocalyptic number.

128450256 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 128450256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183750144).

128450256 is an abundant number, since it is smaller than the sum of its proper divisors (239050032).

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

128450256 is a wasteful number, since it uses less digits than its factorization.

128450256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3720 (or 3714 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 33.

The square root of 128450256 is about 11333.5897225901. The cubic root of 128450256 is about 504.5586523969.

The spelling of 128450256 in words is "one hundred twenty-eight million, four hundred fifty thousand, two hundred fifty-six".