6216404 has 6 divisors (see below), whose sum is σ = 10878714. Its totient is φ = 3108200.

The previous prime is 6216403. The next prime is 6216421. The reversal of 6216404 is 4046126.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5071504 + 1144900 = 2252^2 + 1070^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 6216404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6216403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 777047 + ... + 777054.

It is an arithmetic number, because the mean of its divisors is an integer number (1813119).

Almost surely, 2^6216404 is an apocalyptic number.

It is an amenable number.

6216404 is a deficient number, since it is larger than the sum of its proper divisors (4662310).

6216404 is a wasteful number, since it uses less digits than its factorization.

6216404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554105 (or 1554103 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 6216404 is about 2493.2717461199. The cubic root of 6216404 is about 183.8709318546.

The spelling of 6216404 in words is "six million, two hundred sixteen thousand, four hundred four".