6390603640 has 32 divisors (see below), whose sum is σ = 15135642000. Its totient is φ = 2421702144.

The previous prime is 6390603623. The next prime is 6390603641. The reversal of 6390603640 is 463060936.

It is a self number, because there is not a number n which added to its sum of digits gives 6390603640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6390603641) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4203585 + ... + 4205104.

Almost surely, 2^6390603640 is an apocalyptic number.

It is an amenable number.

6390603640 is an abundant number, since it is smaller than the sum of its proper divisors (8745038360).

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

6390603640 is a wasteful number, since it uses less digits than its factorization.

6390603640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8408719 (or 8408715 counting only the distinct ones).

The product of its (nonzero) digits is 69984, while the sum is 37.

The square root of 6390603640 is about 79941.2511785999. The cubic root of 6390603640 is about 1855.7264625802.

The spelling of 6390603640 in words is "six billion, three hundred ninety million, six hundred three thousand, six hundred forty".