6390440936 has 32 divisors (see below), whose sum is σ = 13493018880. Its totient is φ = 2811043200.

The previous prime is 6390440897. The next prime is 6390440939.

6390440936 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (6390440939) by changing a digit.

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, 1168541 + ... + 1173996.

It is an arithmetic number, because the mean of its divisors is an integer number (421656840).

Almost surely, 2^6390440936 is an apocalyptic number.

It is an amenable number.

6390440936 is an abundant number, since it is smaller than the sum of its proper divisors (7102577944).

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

6390440936 is a wasteful number, since it uses less digits than its factorization.

6390440936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2342585 (or 2342581 counting only the distinct ones).

The product of its (nonzero) digits is 419904, while the sum is 44.

The square root of 6390440936 is about 79940.2335248028. The cubic root of 6390440936 is about 1855.7107135890.

The spelling of 6390440936 in words is "six billion, three hundred ninety million, four hundred forty thousand, nine hundred thirty-six".