8390020 has 24 divisors (see below), whose sum is σ = 18547200. Its totient is φ = 3179232.

The previous prime is 8389973. The next prime is 8390021. The reversal of 8390020 is 200938.

It is a junction number, because it is equal to n+sod(n) for n = 8389973 and 8390000.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8390021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10660 + ... + 11419.

It is an arithmetic number, because the mean of its divisors is an integer number (772800).

Almost surely, 2^8390020 is an apocalyptic number.

It is an amenable number.

8390020 is an abundant number, since it is smaller than the sum of its proper divisors (10157180).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8390020 is a wasteful number, since it uses less digits than its factorization.

8390020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22107 (or 22105 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 8390020 is about 2896.5531239734. The cubic root of 8390020 is about 203.1987344146.

Adding to 8390020 its reverse (200938), we get a palindrome (8590958).

The spelling of 8390020 in words is "eight million, three hundred ninety thousand, twenty".