6444964 has 6 divisors (see below), whose sum is σ = 11278694. Its totient is φ = 3222480.

The previous prime is 6444961. The next prime is 6444967. The reversal of 6444964 is 4694446.

It is an interprime number because it is at equal distance from previous prime (6444961) and next prime (6444967).

It can be written as a sum of positive squares in only one way, i.e., 5428900 + 1016064 = 2330^2 + 1008^2 .

It is a super-2 number, since 2×6444964² = 83075121922592, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6444961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805617 + ... + 805624.

Almost surely, 2^6444964 is an apocalyptic number.

It is an amenable number.

6444964 is a deficient number, since it is larger than the sum of its proper divisors (4833730).

6444964 is a wasteful number, since it uses less digits than its factorization.

6444964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1611245 (or 1611243 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 6444964 is about 2538.6933647056. The cubic root of 6444964 is about 186.0973398851.

The spelling of 6444964 in words is "six million, four hundred forty-four thousand, nine hundred sixty-four".