650388312 has 128 divisors (see below), whose sum is σ = 2186265600. Its totient is φ = 174887424.

The previous prime is 650388293. The next prime is 650388313. The reversal of 650388312 is 213883056.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (650388313) 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, 13053 + ... + 38355.

It is an arithmetic number, because the mean of its divisors is an integer number (17080200).

Almost surely, 2^650388312 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 650388312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1093132800).

650388312 is an abundant number, since it is smaller than the sum of its proper divisors (1535877288).

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

650388312 is a wasteful number, since it uses less digits than its factorization.

650388312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25342 (or 25332 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 650388312 is about 25502.7118558007. The cubic root of 650388312 is about 866.4115689710.

The spelling of 650388312 in words is "six hundred fifty million, three hundred eighty-eight thousand, three hundred twelve".