6399516 has 24 divisors (see below), whose sum is σ = 15414784. Its totient is φ = 2064240.

The previous prime is 6399511. The next prime is 6399521. The reversal of 6399516 is 6159936.

6399516 = T₄₂₃ + T₄₂₄ + ... + T₄₈₄.

It is an interprime number because it is at equal distance from previous prime (6399511) and next prime (6399521).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6399511) 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, 8230 + ... + 8973.

Almost surely, 2^6399516 is an apocalyptic number.

It is an amenable number.

6399516 is an abundant number, since it is smaller than the sum of its proper divisors (9015268).

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

6399516 is a wasteful number, since it uses less digits than its factorization.

6399516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17241 (or 17239 counting only the distinct ones).

The product of its digits is 43740, while the sum is 39.

The square root of 6399516 is about 2529.7264674269. The cubic root of 6399516 is about 185.6588729578.

The spelling of 6399516 in words is "six million, three hundred ninety-nine thousand, five hundred sixteen".