649018 has 8 divisors (see below), whose sum is σ = 979200. Its totient is φ = 322620.

The previous prime is 649007. The next prime is 649039. The reversal of 649018 is 810946.

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 468 + ... + 1231.

It is an arithmetic number, because the mean of its divisors is an integer number (122400).

2⁶⁴⁹⁰¹⁸ is an apocalyptic number.

649018 is a deficient number, since it is larger than the sum of its proper divisors (330182).

649018 is a wasteful number, since it uses less digits than its factorization.

649018 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1892.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 649018 is about 805.6165340905. The cubic root of 649018 is about 86.5802656347.

The spelling of 649018 in words is "six hundred forty-nine thousand, eighteen".