3653998 has 4 divisors (see below), whose sum is σ = 5481000. Its totient is φ = 1826998.

The previous prime is 3653989. The next prime is 3653999. The reversal of 3653998 is 8993563.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3653999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 913498 + ... + 913501.

It is an arithmetic number, because the mean of its divisors is an integer number (1370250).

Almost surely, 2^3653998 is an apocalyptic number.

3653998 is a deficient number, since it is larger than the sum of its proper divisors (1827002).

3653998 is a wasteful number, since it uses less digits than its factorization.

3653998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1827001.

The product of its digits is 174960, while the sum is 43.

The square root of 3653998 is about 1911.5433555115. The cubic root of 3653998 is about 154.0243678762.

The spelling of 3653998 in words is "three million, six hundred fifty-three thousand, nine hundred ninety-eight".