650521340 has 48 divisors (see below), whose sum is σ = 1564151232. Its totient is φ = 222621696.

The previous prime is 650521331. The next prime is 650521343. The reversal of 650521340 is 43125056.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650521343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76754 + ... + 84806.

It is an arithmetic number, because the mean of its divisors is an integer number (32586484).

Almost surely, 2^650521340 is an apocalyptic number.

It is an amenable number.

650521340 is an abundant number, since it is smaller than the sum of its proper divisors (913629892).

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

650521340 is a wasteful number, since it uses less digits than its factorization.

650521340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8646 (or 8644 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 26.

The square root of 650521340 is about 25505.3198372418. The cubic root of 650521340 is about 866.4706358079.

Adding to 650521340 its reverse (43125056), we get a palindrome (693646396).

The spelling of 650521340 in words is "six hundred fifty million, five hundred twenty-one thousand, three hundred forty".