649144 has 16 divisors (see below), whose sum is σ = 1240920. Its totient is φ = 318240.

The previous prime is 649141. The next prime is 649147. The reversal of 649144 is 441946.

It is an interprime number because it is at equal distance from previous prime (649141) and next prime (649147).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649141) 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, 342 + ... + 1189.

2⁶⁴⁹¹⁴⁴ is an apocalyptic number.

It is an amenable number.

649144 is a deficient number, since it is larger than the sum of its proper divisors (591776).

649144 is a wasteful number, since it uses less digits than its factorization.

649144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1590 (or 1586 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 649144 is about 805.6947312723. The cubic root of 649144 is about 86.5858681540.

The spelling of 649144 in words is "six hundred forty-nine thousand, one hundred forty-four".