1863994 has 16 divisors (see below), whose sum is σ = 3072960. Its totient is φ = 840960.

The previous prime is 1863971. The next prime is 1863997. The reversal of 1863994 is 4993681.

1863994 is nontrivially palindromic in base 5.

It is not an unprimeable number, because it can be changed into a prime (1863997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4027 + ... + 4465.

It is an arithmetic number, because the mean of its divisors is an integer number (192060).

2^1863994 is an apocalyptic number.

1863994 is a deficient number, since it is larger than the sum of its proper divisors (1208966).

1863994 is a wasteful number, since it uses less digits than its factorization.

1863994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645.

The product of its digits is 46656, while the sum is 40.

The square root of 1863994 is about 1365.2816559231. The cubic root of 1863994 is about 123.0688578249.

The spelling of 1863994 in words is "one million, eight hundred sixty-three thousand, nine hundred ninety-four".