649307862 has 96 divisors (see below), whose sum is σ = 1721491200. Its totient is φ = 172736064.

The previous prime is 649307861. The next prime is 649307899. The reversal of 649307862 is 268703946.

It is a super-2 number, since 2×649307862² = 843201399310022088, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649307861) 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 47 ways as a sum of consecutive naturals, for example, 138948 + ... + 143544.

It is an arithmetic number, because the mean of its divisors is an integer number (17932200).

Almost surely, 2^649307862 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649307862, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (860745600).

649307862 is an abundant number, since it is smaller than the sum of its proper divisors (1072183338).

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

649307862 is a wasteful number, since it uses less digits than its factorization.

649307862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4690 (or 4687 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 649307862 is about 25481.5200096070. The cubic root of 649307862 is about 865.9315310147.

The spelling of 649307862 in words is "six hundred forty-nine million, three hundred seven thousand, eight hundred sixty-two".