649288 has 16 divisors (see below), whose sum is σ = 1225980. Its totient is φ = 322368.

The previous prime is 649283. The next prime is 649291. The reversal of 649288 is 882946.

It can be written as a sum of positive squares in 2 ways, for example, as 643204 + 6084 = 802^2 + 78^2 .

Its product of digits (27648) is a multiple of the sum of its prime factors (576).

It is not an unprimeable number, because it can be changed into a prime (649283) by changing a digit.

649288 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 3 ways as a sum of consecutive naturals, for example, 2070 + ... + 2362.

2⁶⁴⁹²⁸⁸ is an apocalyptic number.

It is an amenable number.

649288 is a deficient number, since it is larger than the sum of its proper divisors (576692).

649288 is a wasteful number, since it uses less digits than its factorization.

649288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576 (or 572 counting only the distinct ones).

The product of its digits is 27648, while the sum is 37.

The square root of 649288 is about 805.7840901879. The cubic root of 649288 is about 86.5922701455.

It can be divided in two parts, 6 and 49288, that added together give a palindrome (49294).

The spelling of 649288 in words is "six hundred forty-nine thousand, two hundred eighty-eight".