1864004 has 12 divisors (see below), whose sum is σ = 3374700. Its totient is φ = 899808.

The previous prime is 1864003. The next prime is 1864039. The reversal of 1864004 is 4004681.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 719104 + 1144900 = 848^2 + 1070^2 .

It is not an unprimeable number, because it can be changed into a prime (1864001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7919 + ... + 8150.

It is an arithmetic number, because the mean of its divisors is an integer number (281225).

2^1864004 is an apocalyptic number.

It is an amenable number.

1864004 is a deficient number, since it is larger than the sum of its proper divisors (1510696).

1864004 is a wasteful number, since it uses less digits than its factorization.

1864004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16102 (or 16100 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 1864004 is about 1365.2853181661. The cubic root of 1864004 is about 123.0690779054.

Adding to 1864004 its reverse (4004681), we get a palindrome (5868685).

The spelling of 1864004 in words is "one million, eight hundred sixty-four thousand, four".