1904224 has 24 divisors (see below), whose sum is σ = 4285008. Its totient is φ = 816000.

The previous prime is 1904191. The next prime is 1904233. The reversal of 1904224 is 4224091.

1904224 = 140² + 141² + ... + 203².

It is a junction number, because it is equal to n+sod(n) for n = 1904195 and 1904204.

It is a congruent number.

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, 4027 + ... + 4474.

It is an arithmetic number, because the mean of its divisors is an integer number (178542).

2^1904224 is an apocalyptic number.

1904224 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1904224 is an abundant number, since it is smaller than the sum of its proper divisors (2380784).

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

1904224 is an equidigital number, since it uses as much as digits as its factorization.

1904224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8518 (or 8510 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 1904224 is about 1379.9362304107. The cubic root of 1904224 is about 123.9479490175.

The spelling of 1904224 in words is "one million, nine hundred four thousand, two hundred twenty-four".