650250640 has 160 divisors (see below), whose sum is σ = 1700891136. Its totient is φ = 229632000.

The previous prime is 650250631. The next prime is 650250647. The reversal of 650250640 is 46052056.

It is a junction number, because it is equal to n+sod(n) for n = 650250599 and 650250608.

It is not an unprimeable number, because it can be changed into a prime (650250647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2590515 + ... + 2590765.

Almost surely, 2^650250640 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 650250640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (850445568).

650250640 is an abundant number, since it is smaller than the sum of its proper divisors (1050640496).

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

650250640 is a wasteful number, since it uses less digits than its factorization.

650250640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 377 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 650250640 is about 25500.0125490165. The cubic root of 650250640 is about 866.3504316327.

It can be divided in two parts, 650250 and 640, that multiplied together give a square (416160000 = 20400²).

The spelling of 650250640 in words is "six hundred fifty million, two hundred fifty thousand, six hundred forty".