649732356 has 216 divisors, whose sum is σ = 2130612120. Its totient is φ = 165279744.

The previous prime is 649732351. The next prime is 649732361. The reversal of 649732356 is 653237946.

It is an interprime number because it is at equal distance from previous prime (649732351) and next prime (649732361).

It can be written as a sum of positive squares in 4 ways, for example, as 135349956 + 514382400 = 11634^2 + 22680^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (649732351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 664540 + ... + 665516.

It is an arithmetic number, because the mean of its divisors is an integer number (9863945).

Almost surely, 2^649732356 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649732356, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1065306060).

649732356 is an abundant number, since it is smaller than the sum of its proper divisors (1480879764).

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

649732356 is a wasteful number, since it uses less digits than its factorization.

649732356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1043 (or 1031 counting only the distinct ones).

The product of its digits is 816480, while the sum is 45.

The square root of 649732356 is about 25489.8480968404. The cubic root of 649732356 is about 866.1201948139.

The spelling of 649732356 in words is "six hundred forty-nine million, seven hundred thirty-two thousand, three hundred fifty-six".