7865943220 has 48 divisors (see below), whose sum is σ = 16990581888. Its totient is φ = 3056711040.

The previous prime is 7865943203. The next prime is 7865943227. The reversal of 7865943220 is 223495687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7865943227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 503649 + ... + 519031.

It is an arithmetic number, because the mean of its divisors is an integer number (353970456).

Almost surely, 2^7865943220 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 7865943220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8495290944).

7865943220 is an abundant number, since it is smaller than the sum of its proper divisors (9124638668).

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

7865943220 is a wasteful number, since it uses less digits than its factorization.

7865943220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16120 (or 16118 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 7865943220 is about 88690.1528919643. The cubic root of 7865943220 is about 1988.7656141125.

The spelling of 7865943220 in words is "seven billion, eight hundred sixty-five million, nine hundred forty-three thousand, two hundred twenty".