650505240 has 384 divisors, whose sum is σ = 2724433920. Its totient is φ = 130636800.

The previous prime is 650505227. The next prime is 650505257. The reversal of 650505240 is 42505056.

650505240 is a `hidden beast` number, since 650 + 5 + 0 + 5 + 2 + 4 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 858942 + ... + 859698.

It is an arithmetic number, because the mean of its divisors is an integer number (7094880).

Almost surely, 2^650505240 is an apocalyptic number.

650505240 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 650505240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1362216960).

650505240 is an abundant number, since it is smaller than the sum of its proper divisors (2073928680).

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

650505240 is a wasteful number, since it uses less digits than its factorization.

650505240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 823 (or 816 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 650505240 is about 25505.0042148595. The cubic root of 650505240 is about 866.4634875452.

The spelling of 650505240 in words is "six hundred fifty million, five hundred five thousand, two hundred forty".