6398880 has 48 divisors (see below), whose sum is σ = 20157984. Its totient is φ = 1706240.

The previous prime is 6398869. The next prime is 6398881. The reversal of 6398880 is 888936.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (6398881) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6186 + ... + 7145.

It is an arithmetic number, because the mean of its divisors is an integer number (419958).

Almost surely, 2^6398880 is an apocalyptic number.

6398880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6398880 is an abundant number, since it is smaller than the sum of its proper divisors (13759104).

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

6398880 is a wasteful number, since it uses less digits than its factorization.

6398880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13349 (or 13341 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 6398880 is about 2529.6007590132. The cubic root of 6398880 is about 185.6527223387.

The spelling of 6398880 in words is "six million, three hundred ninety-eight thousand, eight hundred eighty".