649794240 has 168 divisors, whose sum is σ = 2289950208. Its totient is φ = 169021440.

The previous prime is 649794239. The next prime is 649794283. The reversal of 649794240 is 42497946.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 115329 + ... + 120831.

It is an arithmetic number, because the mean of its divisors is an integer number (13630656).

Almost surely, 2^649794240 is an apocalyptic number.

649794240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 649794240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1144975104).

649794240 is an abundant number, since it is smaller than the sum of its proper divisors (1640155968).

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

649794240 is a wasteful number, since it uses less digits than its factorization.

649794240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5567 (or 5554 counting only the distinct ones).

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

The square root of 649794240 is about 25491.0619629705. The cubic root of 649794240 is about 866.1476919210.

The spelling of 649794240 in words is "six hundred forty-nine million, seven hundred ninety-four thousand, two hundred forty".