6464381 has 16 divisors (see below), whose sum is σ = 8280960. Its totient is φ = 4898880.

The previous prime is 6464377. The next prime is 6464387. The reversal of 6464381 is 1834646.

It is not a de Polignac number, because 6464381 - 2² = 6464377 is a prime.

It is a super-2 number, since 2×6464381² = 83576443426322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6464387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1715 + ... + 3983.

It is an arithmetic number, because the mean of its divisors is an integer number (517560).

Almost surely, 2^6464381 is an apocalyptic number.

It is an amenable number.

6464381 is a deficient number, since it is larger than the sum of its proper divisors (1816579).

6464381 is a wasteful number, since it uses less digits than its factorization.

6464381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2324.

The product of its digits is 13824, while the sum is 32.

The square root of 6464381 is about 2542.5147000558. The cubic root of 6464381 is about 186.2840401425.

The spelling of 6464381 in words is "six million, four hundred sixty-four thousand, three hundred eighty-one".