6399546 has 16 divisors (see below), whose sum is σ = 13240800. Its totient is φ = 2059568.

The previous prime is 6399541. The next prime is 6399551. The reversal of 6399546 is 6459936.

It is an interprime number because it is at equal distance from previous prime (6399541) and next prime (6399551).

It is a super-2 number, since 2×6399546² = 81908378012232, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6⁵ + 3¹³ + 9⁴ + 9⁷ + 5³ + 4² + 6⁵ .

It is a junction number, because it is equal to n+sod(n) for n = 6399498 and 6399507.

It is not an unprimeable number, because it can be changed into a prime (6399541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18216 + ... + 18563.

It is an arithmetic number, because the mean of its divisors is an integer number (827550).

Almost surely, 2^6399546 is an apocalyptic number.

6399546 is an abundant number, since it is smaller than the sum of its proper divisors (6841254).

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

6399546 is a wasteful number, since it uses less digits than its factorization.

6399546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36813.

The product of its digits is 174960, while the sum is 42.

The square root of 6399546 is about 2529.7323969147. The cubic root of 6399546 is about 185.6591630713.

The spelling of 6399546 in words is "six million, three hundred ninety-nine thousand, five hundred forty-six".