6440012306 has 16 divisors (see below), whose sum is σ = 11889253824. Its totient is φ = 2547697104.

The previous prime is 6440012279. The next prime is 6440012377. The reversal of 6440012306 is 6032100446.

It is a super-3 number, since 3×6440012306³ (a number of 30 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17692160 + ... + 17692523.

It is an arithmetic number, because the mean of its divisors is an integer number (743078364).

Almost surely, 2^6440012306 is an apocalyptic number.

6440012306 is a deficient number, since it is larger than the sum of its proper divisors (5449241518).

6440012306 is a wasteful number, since it uses less digits than its factorization.

6440012306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35384705.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 6440012306 is about 80249.6872641881. The cubic root of 6440012306 is about 1860.4966787440.

The spelling of 6440012306 in words is "six billion, four hundred forty million, twelve thousand, three hundred six".