649431552 has 480 divisors, whose sum is σ = 2411988480. Its totient is φ = 150405120.

The previous prime is 649431529. The next prime is 649431581. The reversal of 649431552 is 255134946.

It is a super-2 number, since 2×649431552² = 843522681466257408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 649431552.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 34180599 + ... + 34180617.

It is an arithmetic number, because the mean of its divisors is an integer number (5024976).

Almost surely, 2^649431552 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 649431552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1205994240).

649431552 is an abundant number, since it is smaller than the sum of its proper divisors (1762556928).

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

649431552 is a wasteful number, since it uses less digits than its factorization.

649431552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92 (or 59 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 649431552 is about 25483.9469470488. The cubic root of 649431552 is about 865.9865127765.

The spelling of 649431552 in words is "six hundred forty-nine million, four hundred thirty-one thousand, five hundred fifty-two".