650960640 has 324 divisors, whose sum is σ = 2480921352. Its totient is φ = 157470720.

The previous prime is 650960627. The next prime is 650960657. The reversal of 650960640 is 46069056.

It is a happy number.

650960640 is a `hidden beast` number, since 6 + 5 + 0 + 9 + 6 + 0 + 640 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 650960595 and 650960604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1393687 + ... + 1394153.

Almost surely, 2^650960640 is an apocalyptic number.

650960640 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 650960640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1240460676).

650960640 is an abundant number, since it is smaller than the sum of its proper divisors (1829960712).

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

650960640 is a wasteful number, since it uses less digits than its factorization.

650960640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516 (or 488 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 650960640 is about 25513.9303126743. The cubic root of 650960640 is about 866.6656357647.

The spelling of 650960640 in words is "six hundred fifty million, nine hundred sixty thousand, six hundred forty".