128450844 has 36 divisors (see below), whose sum is σ = 343796544. Its totient is φ = 40298112.

The previous prime is 128450821. The next prime is 128450867. The reversal of 128450844 is 448054821.

128450844 is a `hidden beast` number, since 128 + 450 + 84 + 4 = 666.

It is an interprime number because it is at equal distance from previous prime (128450821) and next prime (128450867).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 128450799 and 128450808.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104332 + ... + 105555.

It is an arithmetic number, because the mean of its divisors is an integer number (9549904).

Almost surely, 2^128450844 is an apocalyptic number.

It is an amenable number.

128450844 is an abundant number, since it is smaller than the sum of its proper divisors (215345700).

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

128450844 is a wasteful number, since it uses less digits than its factorization.

128450844 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209914 (or 209909 counting only the distinct ones).

The product of its (nonzero) digits is 40960, while the sum is 36.

The square root of 128450844 is about 11333.6156631500. The cubic root of 128450844 is about 504.5594222930.

The spelling of 128450844 in words is "one hundred twenty-eight million, four hundred fifty thousand, eight hundred forty-four".