3644990 has 8 divisors (see below), whose sum is σ = 6561000. Its totient is φ = 1457992.

The previous prime is 3644983. The next prime is 3644999. The reversal of 3644990 is 994463.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3644990.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644999) 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, 182240 + ... + 182259.

It is an arithmetic number, because the mean of its divisors is an integer number (820125).

Almost surely, 2^3644990 is an apocalyptic number.

3644990 is a deficient number, since it is larger than the sum of its proper divisors (2916010).

3644990 is a wasteful number, since it uses less digits than its factorization.

3644990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 364506.

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 3644990 is about 1909.1856902879. The cubic root of 3644990 is about 153.8976944620.

The spelling of 3644990 in words is "three million, six hundred forty-four thousand, nine hundred ninety".