8420284 has 6 divisors (see below), whose sum is σ = 14735504. Its totient is φ = 4210140.

The previous prime is 8420281. The next prime is 8420311. The reversal of 8420284 is 4820248.

8420284 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8420281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1052532 + ... + 1052539.

Almost surely, 2^8420284 is an apocalyptic number.

It is an amenable number.

8420284 is a deficient number, since it is larger than the sum of its proper divisors (6315220).

8420284 is a wasteful number, since it uses less digits than its factorization.

8420284 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2105075 (or 2105073 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 28.

The square root of 8420284 is about 2901.7725617284. The cubic root of 8420284 is about 203.4427635155.

The spelling of 8420284 in words is "eight million, four hundred twenty thousand, two hundred eighty-four".