6415864 has 48 divisors (see below), whose sum is σ = 15082200. Its totient is φ = 2536128.

The previous prime is 6415861. The next prime is 6415883. The reversal of 6415864 is 4685146.

6415864 = T₉₈₇ + T₉₈₈ + ... + T₉₉₉.

6415864 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6415861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4467 + ... + 5725.

Almost surely, 2^6415864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6415864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7541100).

6415864 is an abundant number, since it is smaller than the sum of its proper divisors (8666336).

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

6415864 is a wasteful number, since it uses less digits than its factorization.

6415864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292 (or 1281 counting only the distinct ones).

The product of its digits is 23040, while the sum is 34.

The square root of 6415864 is about 2532.9555858720. The cubic root of 6415864 is about 185.8168312792.

The spelling of 6415864 in words is "six million, four hundred fifteen thousand, eight hundred sixty-four".