6406984 has 8 divisors (see below), whose sum is σ = 12013110. Its totient is φ = 3203488.

The previous prime is 6406973. The next prime is 6406997. The reversal of 6406984 is 4896046.

It can be written as a sum of positive squares in only one way, i.e., 6400900 + 6084 = 2530^2 + 78^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400429 + ... + 400444.

Almost surely, 2^6406984 is an apocalyptic number.

It is an amenable number.

6406984 is a deficient number, since it is larger than the sum of its proper divisors (5606126).

6406984 is a wasteful number, since it uses less digits than its factorization.

6406984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 800879 (or 800875 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 6406984 is about 2531.2020859663. The cubic root of 6406984 is about 185.7310639110.

The spelling of 6406984 in words is "six million, four hundred six thousand, nine hundred eighty-four".