8420620 has 48 divisors (see below), whose sum is σ = 19262880. Its totient is φ = 3073536.

The previous prime is 8420603. The next prime is 8420651. The reversal of 8420620 is 260248.

It is a junction number, because it is equal to n+sod(n) for n = 8420591 and 8420600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36024 + ... + 36256.

It is an arithmetic number, because the mean of its divisors is an integer number (401310).

Almost surely, 2^8420620 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8420620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9631440).

8420620 is an abundant number, since it is smaller than the sum of its proper divisors (10842260).

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

8420620 is a wasteful number, since it uses less digits than its factorization.

8420620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 392 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

The square root of 8420620 is about 2901.8304567979. The cubic root of 8420620 is about 203.4454695152.

Adding to 8420620 its reverse (260248), we get a palindrome (8680868).

The spelling of 8420620 in words is "eight million, four hundred twenty thousand, six hundred twenty".