7944221592 has 48 divisors (see below), whose sum is σ = 21520923840. Its totient is φ = 2647418688.

The previous prime is 7944221573. The next prime is 7944221599. The reversal of 7944221592 is 2951224497.

7944221592 is a `hidden beast` number, since 79 + 4 + 422 + 159 + 2 = 666.

It is a super-2 number, since 2×7944221592² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7944221599) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 343993 + ... + 366359.

It is an arithmetic number, because the mean of its divisors is an integer number (448352580).

Almost surely, 2^7944221592 is an apocalyptic number.

7944221592 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7944221592 is an abundant number, since it is smaller than the sum of its proper divisors (13576702248).

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

7944221592 is a wasteful number, since it uses less digits than its factorization.

7944221592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27312 (or 27305 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 7944221592 is about 89130.3629073729. The cubic root of 7944221592 is about 1995.3409544081.

The spelling of 7944221592 in words is "seven billion, nine hundred forty-four million, two hundred twenty-one thousand, five hundred ninety-two".