3663998 has 16 divisors (see below), whose sum is σ = 6231120. Its totient is φ = 1601856.

The previous prime is 3663971. The next prime is 3664013. The reversal of 3663998 is 8993663.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3215 + ... + 4202.

It is an arithmetic number, because the mean of its divisors is an integer number (389445).

Almost surely, 2^3663998 is an apocalyptic number.

3663998 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

3663998 is a deficient number, since it is larger than the sum of its proper divisors (2567122).

3663998 is a wasteful number, since it uses less digits than its factorization.

3663998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7451.

The product of its digits is 209952, while the sum is 44.

The square root of 3663998 is about 1914.1572558178. The cubic root of 3663998 is about 154.1647475128.

The spelling of 3663998 in words is "three million, six hundred sixty-three thousand, nine hundred ninety-eight".