6399562 has 16 divisors (see below), whose sum is σ = 10444392. Its totient is φ = 2923200.

The previous prime is 6399551. The next prime is 6399577. The reversal of 6399562 is 2659936.

It can be written as a sum of positive squares in 4 ways, for example, as 6395841 + 3721 = 2529^2 + 61^2 .

It is a d-powerful number, because it can be written as 6⁵ + 3¹³ + 9⁴ + 9⁷ + 5³ + 6⁵ + 2⁵ .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1408 + ... + 3844.

Almost surely, 2^6399562 is an apocalyptic number.

6399562 is a deficient number, since it is larger than the sum of its proper divisors (4044830).

6399562 is a wasteful number, since it uses less digits than its factorization.

6399562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553.

The product of its digits is 87480, while the sum is 40.

The square root of 6399562 is about 2529.7355593026. The cubic root of 6399562 is about 185.6593177981.

It can be divided in two parts, 639 and 9562, that added together give a palindrome (10201).

The spelling of 6399562 in words is "six million, three hundred ninety-nine thousand, five hundred sixty-two".