4293221857928 has 32 divisors (see below), whose sum is σ = 8335526535000. Its totient is φ = 2070559787520.

The previous prime is 4293221857921. The next prime is 4293221857943. The reversal of 4293221857928 is 8297581223924.

It can be written as a sum of positive squares in 4 ways, for example, as 3408978780964 + 884243076964 = 1846342^2 + 940342^2 .

It is not an unprimeable number, because it can be changed into a prime (4293221857921) 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, 8825453 + ... + 9299196.

Almost surely, 2^{4293221857928} is an apocalyptic number.

It is an amenable number.

4293221857928 is a deficient number, since it is larger than the sum of its proper divisors (4042304677072).

4293221857928 is a wasteful number, since it uses less digits than its factorization.

4293221857928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18125705 (or 18125701 counting only the distinct ones).

The product of its digits is 34836480, while the sum is 62.

The spelling of 4293221857928 in words is "four trillion, two hundred ninety-three billion, two hundred twenty-one million, eight hundred fifty-seven thousand, nine hundred twenty-eight".