6215864 has 8 divisors (see below), whose sum is σ = 11654760. Its totient is φ = 3107928.

The previous prime is 6215861. The next prime is 6215873. The reversal of 6215864 is 4685126.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 6215864.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6215861) 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 as a sum of consecutive naturals, namely, 388484 + ... + 388499.

It is an arithmetic number, because the mean of its divisors is an integer number (1456845).

Almost surely, 2^6215864 is an apocalyptic number.

It is an amenable number.

6215864 is a deficient number, since it is larger than the sum of its proper divisors (5438896).

6215864 is a wasteful number, since it uses less digits than its factorization.

6215864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 776989 (or 776985 counting only the distinct ones).

The product of its digits is 11520, while the sum is 32.

The square root of 6215864 is about 2493.1634523232. The cubic root of 6215864 is about 183.8656075987.

The spelling of 6215864 in words is "six million, two hundred fifteen thousand, eight hundred sixty-four".