4398221857 has 8 divisors (see below), whose sum is σ = 4517966376. Its totient is φ = 4278523392.

The previous prime is 4398221843. The next prime is 4398221881. The reversal of 4398221857 is 7581228934.

It can be written as a sum of positive squares in 4 ways, for example, as 523906321 + 3874315536 = 22889^2 + 62244^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4398221857 - 2¹¹ = 4398219809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4398221857.

It is not an unprimeable number, because it can be changed into a prime (4398221837) 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, 282993 + ... + 298129.

It is an arithmetic number, because the mean of its divisors is an integer number (564745797).

Almost surely, 2^4398221857 is an apocalyptic number.

It is an amenable number.

4398221857 is a deficient number, since it is larger than the sum of its proper divisors (119744519).

4398221857 is a wasteful number, since it uses less digits than its factorization.

4398221857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23027.

The product of its digits is 967680, while the sum is 49.

The square root of 4398221857 is about 66319.0911955223. The cubic root of 4398221857 is about 1638.4217735228.

The spelling of 4398221857 in words is "four billion, three hundred ninety-eight million, two hundred twenty-one thousand, eight hundred fifty-seven".