6219864 has 144 divisors (see below), whose sum is σ = 20540520. Its totient is φ = 1693440.

The previous prime is 6219853. The next prime is 6219887. The reversal of 6219864 is 4689126.

6219864 = 332² + 333² + ... + 380².

6219864 is digitally balanced in base 8, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

Its product of digits (20736) is a multiple of the sum of its prime divisors (96).

6219864 is strictly pandigital in base 8.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 144627 + ... + 144669.

Almost surely, 2^6219864 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 6219864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10270260).

6219864 is an abundant number, since it is smaller than the sum of its proper divisors (14320656).

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

6219864 is a wasteful number, since it uses less digits than its factorization.

6219864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110 (or 96 counting only the distinct ones).

The product of its digits is 20736, while the sum is 36.

The square root of 6219864 is about 2493.9655170030. The cubic root of 6219864 is about 183.9050392168.

The spelling of 6219864 in words is "six million, two hundred nineteen thousand, eight hundred sixty-four".