7821093828 has 24 divisors (see below), whose sum is σ = 18286400160. Its totient is φ = 2601719680.

The previous prime is 7821093827. The next prime is 7821093853. The reversal of 7821093828 is 8283901287.

It is a super-2 number, since 2×7821093828² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (7821093827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 657813 + ... + 669596.

It is an arithmetic number, because the mean of its divisors is an integer number (761933340).

Almost surely, 2^7821093828 is an apocalyptic number.

It is an amenable number.

7821093828 is an abundant number, since it is smaller than the sum of its proper divisors (10465306332).

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

7821093828 is a wasteful number, since it uses less digits than its factorization.

7821093828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1327907 (or 1327905 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 7821093828 is about 88436.9483191273. The cubic root of 7821093828 is about 1984.9786137658.

The spelling of 7821093828 in words is "seven billion, eight hundred twenty-one million, ninety-three thousand, eight hundred twenty-eight".