8424428 has 6 divisors (see below), whose sum is σ = 14742756. Its totient is φ = 4212212.

The previous prime is 8424407. The next prime is 8424439. The reversal of 8424428 is 8244248.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8424394 and 8424403.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1053050 + ... + 1053057.

It is an arithmetic number, because the mean of its divisors is an integer number (2457126).

Almost surely, 2^8424428 is an apocalyptic number.

It is an amenable number.

8424428 is a deficient number, since it is larger than the sum of its proper divisors (6318328).

8424428 is a wasteful number, since it uses less digits than its factorization.

8424428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2106111 (or 2106109 counting only the distinct ones).

The product of its digits is 16384, while the sum is 32.

The square root of 8424428 is about 2902.4865202099. The cubic root of 8424428 is about 203.4761324828.

The spelling of 8424428 in words is "eight million, four hundred twenty-four thousand, four hundred twenty-eight".