649388 has 12 divisors (see below), whose sum is σ = 1173312. Its totient is φ = 314160.

The previous prime is 649381. The next prime is 649403. The reversal of 649388 is 883946.

649388 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 649388.

It is not an unprimeable number, because it can be changed into a prime (649381) 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, 2495 + ... + 2742.

It is an arithmetic number, because the mean of its divisors is an integer number (97776).

2⁶⁴⁹³⁸⁸ is an apocalyptic number.

It is an amenable number.

649388 is a deficient number, since it is larger than the sum of its proper divisors (523924).

649388 is a wasteful number, since it uses less digits than its factorization.

649388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5272 (or 5270 counting only the distinct ones).

The product of its digits is 41472, while the sum is 38.

The square root of 649388 is about 805.8461391606. The cubic root of 649388 is about 86.5967154161.

It can be divided in two parts, 64938 and 8, that added together give a palindrome (64946).

The spelling of 649388 in words is "six hundred forty-nine thousand, three hundred eighty-eight".