7728224420 has 48 divisors (see below), whose sum is σ = 18561043200. Its totient is φ = 2647776384.

The previous prime is 7728224417. The next prime is 7728224437. The reversal of 7728224420 is 244228277.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 183506 + ... + 221654.

It is an arithmetic number, because the mean of its divisors is an integer number (386688400).

Almost surely, 2^7728224420 is an apocalyptic number.

7728224420 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

7728224420 is an abundant number, since it is smaller than the sum of its proper divisors (10832818780).

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

7728224420 is a wasteful number, since it uses less digits than its factorization.

7728224420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39612 (or 39610 counting only the distinct ones).

The product of its (nonzero) digits is 100352, while the sum is 38.

The square root of 7728224420 is about 87910.3203270242. The cubic root of 7728224420 is about 1977.0906170665.

The spelling of 7728224420 in words is "seven billion, seven hundred twenty-eight million, two hundred twenty-four thousand, four hundred twenty".