7821093852 has 144 divisors (see below), whose sum is σ = 23521505280. Its totient is φ = 2159913600.

The previous prime is 7821093827. The next prime is 7821093853. The reversal of 7821093852 is 2583901287.

It is a happy number.

It is a super-2 number, since 2×7821093852² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 7821093798 and 7821093807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7821093853) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 397077 + ... + 416307.

Almost surely, 2^7821093852 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 7821093852, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11760752640).

7821093852 is an abundant number, since it is smaller than the sum of its proper divisors (15700411428).

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

7821093852 is a wasteful number, since it uses less digits than its factorization.

7821093852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19344 (or 19339 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 7821093852 is about 88436.9484548172. The cubic root of 7821093852 is about 1984.9786157962.

The spelling of 7821093852 in words is "seven billion, eight hundred twenty-one million, ninety-three thousand, eight hundred fifty-two".