6412644 has 36 divisors (see below), whose sum is σ = 18526144. Its totient is φ = 1832112.

The previous prime is 6412643. The next prime is 6412657. The reversal of 6412644 is 4462146.

6412644 is a `hidden beast` number, since 6 + 4 + 12 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×6412644² = 82244006141472, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6412643) 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 in 11 ways as a sum of consecutive naturals, for example, 12472 + ... + 12975.

Almost surely, 2^6412644 is an apocalyptic number.

It is an amenable number.

6412644 is an abundant number, since it is smaller than the sum of its proper divisors (12113500).

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

6412644 is a wasteful number, since it uses less digits than its factorization.

6412644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25464 (or 25459 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 6412644 is about 2532.3198850066. The cubic root of 6412644 is about 185.7857401006.

It can be divided in two parts, 6412 and 644, that added together give a square (7056 = 84²).

The spelling of 6412644 in words is "six million, four hundred twelve thousand, six hundred forty-four".