3640918 has 8 divisors (see below), whose sum is σ = 5475960. Its totient is φ = 1815600.

The previous prime is 3640909. The next prime is 3640933. The reversal of 3640918 is 8190463.

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

It is a self number, because there is not a number n which added to its sum of digits gives 3640918.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1408 + ... + 3043.

It is an arithmetic number, because the mean of its divisors is an integer number (684495).

Almost surely, 2^3640918 is an apocalyptic number.

3640918 is a deficient number, since it is larger than the sum of its proper divisors (1835042).

3640918 is a wasteful number, since it uses less digits than its factorization.

3640918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4862.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 3640918 is about 1908.1189690373. The cubic root of 3640918 is about 153.8403641796.

The spelling of 3640918 in words is "three million, six hundred forty thousand, nine hundred eighteen".