649612 has 18 divisors (see below), whose sum is σ = 1192268. Its totient is φ = 309672.

The previous prime is 649577. The next prime is 649613. The reversal of 649612 is 216946.

649612 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (649613) by changing a digit.

649612 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1963 + ... + 2269.

2⁶⁴⁹⁶¹² is an apocalyptic number.

It is an amenable number.

649612 is a deficient number, since it is larger than the sum of its proper divisors (542656).

649612 is a wasteful number, since it uses less digits than its factorization.

649612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357 (or 332 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 649612 is about 805.9851115250. The cubic root of 649612 is about 86.6066711664.

The spelling of 649612 in words is "six hundred forty-nine thousand, six hundred twelve".