8428931 has 18 divisors (see below), whose sum is σ = 10188180. Its totient is φ = 6952680.

The previous prime is 8428909. The next prime is 8428943. The reversal of 8428931 is 1398248.

It is a happy number.

It is not a de Polignac number, because 8428931 - 2⁶ = 8428867 is a prime.

It is a super-2 number, since 2×8428931² = 142093755605522, which contains 22 as substring.

It is a d-powerful number, because it can be written as 8 + 4⁴ + 2²³ + 8⁵ + 9³ + 3⁸ + 1 .

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8428891 and 8428900.

It is not an unprimeable number, because it can be changed into a prime (8428031) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 47000 + ... + 47178.

It is an arithmetic number, because the mean of its divisors is an integer number (566010).

Almost surely, 2^8428931 is an apocalyptic number.

8428931 is a deficient number, since it is larger than the sum of its proper divisors (1759249).

8428931 is a wasteful number, since it uses less digits than its factorization.

8428931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255 (or 217 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 8428931 is about 2903.2621307763. The cubic root of 8428931 is about 203.5123798428.

The spelling of 8428931 in words is "eight million, four hundred twenty-eight thousand, nine hundred thirty-one".