4218656 has 24 divisors (see below), whose sum is σ = 8945244. Its totient is φ = 1946880.

The previous prime is 4218631. The next prime is 4218667. The reversal of 4218656 is 6568124.

It can be written as a sum of positive squares in 2 ways, for example, as 3671056 + 547600 = 1916^2 + 740^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4655 + ... + 5486.

Almost surely, 2^4218656 is an apocalyptic number.

It is an amenable number.

4218656 is an abundant number, since it is smaller than the sum of its proper divisors (4726588).

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

4218656 is a wasteful number, since it uses less digits than its factorization.

4218656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10164 (or 10156 counting only the distinct ones).

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

The square root of 4218656 is about 2053.9367078856. The cubic root of 4218656 is about 161.5814016436.

The spelling of 4218656 in words is "four million, two hundred eighteen thousand, six hundred fifty-six".