650319840 has 360 divisors, whose sum is σ = 2439664920. Its totient is φ = 163109376.

The previous prime is 650319823. The next prime is 650319919. The reversal of 650319840 is 48913056.

It is a tau number, because it is divible by the number of its divisors (360).

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 = 650319795 and 650319804.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 4678491 + ... + 4678629.

It is an arithmetic number, because the mean of its divisors is an integer number (6776847).

Almost surely, 2^650319840 is an apocalyptic number.

650319840 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 650319840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1219832460).

650319840 is an abundant number, since it is smaller than the sum of its proper divisors (1789345080).

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

650319840 is a wasteful number, since it uses less digits than its factorization.

650319840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204 (or 168 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 650319840 is about 25501.3693749963. The cubic root of 650319840 is about 866.3811630254.

The spelling of 650319840 in words is "six hundred fifty million, three hundred nineteen thousand, eight hundred forty".