8428331 has 4 divisors (see below), whose sum is σ = 8503032. Its totient is φ = 8353632.

The previous prime is 8428319. The next prime is 8428333. The reversal of 8428331 is 1338248.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-8428331 is a prime.

It is a super-2 number, since 2×8428331² = 142073526891122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8428294 and 8428303.

It is not an unprimeable number, because it can be changed into a prime (8428333) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37181 + ... + 37406.

It is an arithmetic number, because the mean of its divisors is an integer number (2125758).

Almost surely, 2^8428331 is an apocalyptic number.

8428331 is a deficient number, since it is larger than the sum of its proper divisors (74701).

8428331 is a wasteful number, since it uses less digits than its factorization.

8428331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74700.

The product of its digits is 4608, while the sum is 29.

The square root of 8428331 is about 2903.1587968969. The cubic root of 8428331 is about 203.5075508269.

The spelling of 8428331 in words is "eight million, four hundred twenty-eight thousand, three hundred thirty-one".