6445128 has 16 divisors (see below), whose sum is σ = 16112880. Its totient is φ = 2148368.

The previous prime is 6445099. The next prime is 6445147. The reversal of 6445128 is 8215446.

It is a junction number, because it is equal to n+sod(n) for n = 6445095 and 6445104.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134250 + ... + 134297.

It is an arithmetic number, because the mean of its divisors is an integer number (1007055).

Almost surely, 2^6445128 is an apocalyptic number.

It is an amenable number.

6445128 is an abundant number, since it is smaller than the sum of its proper divisors (9667752).

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

6445128 is a wasteful number, since it uses less digits than its factorization.

6445128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268556 (or 268552 counting only the distinct ones).

The product of its digits is 7680, while the sum is 30.

The square root of 6445128 is about 2538.7256645806. The cubic root of 6445128 is about 186.0989183633.

The spelling of 6445128 in words is "six million, four hundred forty-five thousand, one hundred twenty-eight".