6399056 has 10 divisors (see below), whose sum is σ = 12398202. Its totient is φ = 3199520.

The previous prime is 6399049. The next prime is 6399059. The reversal of 6399056 is 6509936.

It can be written as a sum of positive squares in only one way, i.e., 4910656 + 1488400 = 2216^2 + 1220^2 .

It is a super-2 number, since 2×6399056² = 81895835382272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199955 + ... + 199986.

Almost surely, 2^6399056 is an apocalyptic number.

It is an amenable number.

6399056 is a deficient number, since it is larger than the sum of its proper divisors (5999146).

6399056 is a wasteful number, since it uses less digits than its factorization.

6399056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 399949 (or 399943 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 38.

The square root of 6399056 is about 2529.6355468723. The cubic root of 6399056 is about 185.6544244376.

It can be divided in two parts, 63990 and 56, that added together give a palindrome (64046).

The spelling of 6399056 in words is "six million, three hundred ninety-nine thousand, fifty-six".