6442880 has 32 divisors (see below), whose sum is σ = 15404040. Its totient is φ = 2576896.

The previous prime is 6442879. The next prime is 6442883. The reversal of 6442880 is 882446.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6442883) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4394 + ... + 5673.

Almost surely, 2^6442880 is an apocalyptic number.

It is an amenable number.

6442880 is an abundant number, since it is smaller than the sum of its proper divisors (8961160).

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

6442880 is a wasteful number, since it uses less digits than its factorization.

6442880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10086 (or 10074 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 6442880 is about 2538.2828841561. The cubic root of 6442880 is about 186.0772793301.

The spelling of 6442880 in words is "six million, four hundred forty-two thousand, eight hundred eighty".