8859857421 has 16 divisors (see below), whose sum is σ = 11905652736. Its totient is φ = 5860478976.

The previous prime is 8859857417. The next prime is 8859857423. The reversal of 8859857421 is 1247589588.

It is not a de Polignac number, because 8859857421 - 2² = 8859857417 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8859857423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 201781 + ... + 241733.

It is an arithmetic number, because the mean of its divisors is an integer number (744103296).

Almost surely, 2^8859857421 is an apocalyptic number.

It is an amenable number.

8859857421 is a deficient number, since it is larger than the sum of its proper divisors (3045795315).

8859857421 is a wasteful number, since it uses less digits than its factorization.

8859857421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40532.

The product of its digits is 6451200, while the sum is 57.

The square root of 8859857421 is about 94126.8156318910. The cubic root of 8859857421 is about 2069.2306896418.

The spelling of 8859857421 in words is "eight billion, eight hundred fifty-nine million, eight hundred fifty-seven thousand, four hundred twenty-one".