650917872 has 120 divisors (see below), whose sum is σ = 2011621248. Its totient is φ = 194832000.

The previous prime is 650917867. The next prime is 650917901. The reversal of 650917872 is 278719056.

650917872 is a `hidden beast` number, since 6 + 509 + 1 + 78 + 72 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 128997 + ... + 133947.

Almost surely, 2^650917872 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 650917872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1005810624).

650917872 is an abundant number, since it is smaller than the sum of its proper divisors (1360703376).

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

650917872 is a wasteful number, since it uses less digits than its factorization.

650917872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5059 (or 5050 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 45.

The square root of 650917872 is about 25513.0921685318. The cubic root of 650917872 is about 866.6466554222.

The spelling of 650917872 in words is "six hundred fifty million, nine hundred seventeen thousand, eight hundred seventy-two".