6499390 has 16 divisors (see below), whose sum is σ = 11920608. Its totient is φ = 2550496.

The previous prime is 6499379. The next prime is 6499391. The reversal of 6499390 is 939946.

It is a d-powerful number, because it can be written as 6⁸ + 4⁷ + 9 + 9³ + 3⁹ + 9⁷ + 0 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6499391) 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, 5602 + ... + 6661.

It is an arithmetic number, because the mean of its divisors is an integer number (745038).

Almost surely, 2^6499390 is an apocalyptic number.

6499390 is a deficient number, since it is larger than the sum of its proper divisors (5421218).

6499390 is a wasteful number, since it uses less digits than its factorization.

6499390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12323.

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 6499390 is about 2549.3901231471. The cubic root of 6499390 is about 186.6197196280.

It can be divided in two parts, 6499 and 390, that added together give a square (6889 = 83²).

The spelling of 6499390 in words is "six million, four hundred ninety-nine thousand, three hundred ninety".