6390538 has 32 divisors (see below), whose sum is σ = 12659328. Its totient is φ = 2342400.

The previous prime is 6390533. The next prime is 6390541. The reversal of 6390538 is 8350936.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is not an unprimeable number, because it can be changed into a prime (6390533) 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, 1398 + ... + 3838.

It is an arithmetic number, because the mean of its divisors is an integer number (395604).

Almost surely, 2^6390538 is an apocalyptic number.

6390538 is a deficient number, since it is larger than the sum of its proper divisors (6268790).

6390538 is a wasteful number, since it uses less digits than its factorization.

6390538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2478.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 6390538 is about 2527.9513444685. The cubic root of 6390538 is about 185.5720108965.

It can be divided in two parts, 63 and 90538, that added together give a square (90601 = 301²).

The spelling of 6390538 in words is "six million, three hundred ninety thousand, five hundred thirty-eight".