6219904 has 16 divisors (see below), whose sum is σ = 12391470. Its totient is φ = 3109888.

The previous prime is 6219901. The next prime is 6219919. The reversal of 6219904 is 4099126.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 5053504 + 1166400 = 2248^2 + 1080^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (6219901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24169 + ... + 24424.

Almost surely, 2^6219904 is an apocalyptic number.

6219904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6219904 is a deficient number, since it is larger than the sum of its proper divisors (6171566).

6219904 is an equidigital number, since it uses as much as digits as its factorization.

6219904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48607 (or 48595 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 6219904 is about 2493.9735363472. The cubic root of 6219904 is about 183.9054334476.

The spelling of 6219904 in words is "six million, two hundred nineteen thousand, nine hundred four".