6440286039 has 16 divisors (see below), whose sum is σ = 9373833984. Its totient is φ = 3900643200.

The previous prime is 6440286011. The next prime is 6440286067. The reversal of 6440286039 is 9306820446.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (6440286011) and next prime (6440286067).

It is not a de Polignac number, because 6440286039 - 2⁵ = 6440286007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440286089) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12322 + ... + 114159.

It is an arithmetic number, because the mean of its divisors is an integer number (585864624).

Almost surely, 2^6440286039 is an apocalyptic number.

6440286039 is a deficient number, since it is larger than the sum of its proper divisors (2933547945).

6440286039 is a wasteful number, since it uses less digits than its factorization.

6440286039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128038.

The product of its (nonzero) digits is 248832, while the sum is 42.

The square root of 6440286039 is about 80251.3927542694. The cubic root of 6440286039 is about 1860.5230385343.

The spelling of 6440286039 in words is "six billion, four hundred forty million, two hundred eighty-six thousand, thirty-nine".