649722288 has 40 divisors (see below), whose sum is σ = 1680590848. Its totient is φ = 216297792.

The previous prime is 649722287. The next prime is 649722289. The reversal of 649722288 is 882227946.

It is an interprime number because it is at equal distance from previous prime (649722287) and next prime (649722289).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (649722287) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31281 + ... + 47727.

Almost surely, 2^649722288 is an apocalyptic number.

It is an amenable number.

649722288 is an abundant number, since it is smaller than the sum of its proper divisors (1030868560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

649722288 is a wasteful number, since it uses less digits than its factorization.

649722288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17281 (or 17275 counting only the distinct ones).

The product of its digits is 774144, while the sum is 48.

The square root of 649722288 is about 25489.6506056870. The cubic root of 649722288 is about 866.1157211035.

The spelling of 649722288 in words is "six hundred forty-nine million, seven hundred twenty-two thousand, two hundred eighty-eight".