8539785428 has 24 divisors (see below), whose sum is σ = 15381342144. Its totient is φ = 4146912000.

The previous prime is 8539785427. The next prime is 8539785433. The reversal of 8539785428 is 8245879358.

It is a super-2 number, since 2×8539785428² (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 (8539785427) 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, 205373 + ... + 243428.

It is an arithmetic number, because the mean of its divisors is an integer number (640889256).

Almost surely, 2^8539785428 is an apocalyptic number.

It is an amenable number.

8539785428 is a deficient number, since it is larger than the sum of its proper divisors (6841556716).

8539785428 is a wasteful number, since it uses less digits than its factorization.

8539785428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448943 (or 448941 counting only the distinct ones).

The product of its digits is 19353600, while the sum is 59.

The square root of 8539785428 is about 92410.9594582807. The cubic root of 8539785428 is about 2044.0067213191.

The spelling of 8539785428 in words is "eight billion, five hundred thirty-nine million, seven hundred eighty-five thousand, four hundred twenty-eight".