3649918 has 4 divisors (see below), whose sum is σ = 5474880. Its totient is φ = 1824958.

The previous prime is 3649913. The next prime is 3649931. The reversal of 3649918 is 8199463.

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

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3649913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 912478 + ... + 912481.

It is an arithmetic number, because the mean of its divisors is an integer number (1368720).

Almost surely, 2^3649918 is an apocalyptic number.

3649918 is a deficient number, since it is larger than the sum of its proper divisors (1824962).

3649918 is a wasteful number, since it uses less digits than its factorization.

3649918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1824961.

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

The square root of 3649918 is about 1910.4758569529. The cubic root of 3649918 is about 153.9670194174.

The spelling of 3649918 in words is "three million, six hundred forty-nine thousand, nine hundred eighteen".