7850817920 has 192 divisors, whose sum is σ = 20920742640. Its totient is φ = 2793922560.

The previous prime is 7850817869. The next prime is 7850817937. The reversal of 7850817920 is 297180587.

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, 19775162 + ... + 19775558.

Almost surely, 2^7850817920 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 7850817920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10460371320).

7850817920 is an abundant number, since it is smaller than the sum of its proper divisors (13069924720).

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

7850817920 is a wasteful number, since it uses less digits than its factorization.

7850817920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 533 (or 468 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 47.

The square root of 7850817920 is about 88604.8414027134. The cubic root of 7850817920 is about 1987.4900740245.

The spelling of 7850817920 in words is "seven billion, eight hundred fifty million, eight hundred seventeen thousand, nine hundred twenty".