8405420 has 12 divisors (see below), whose sum is σ = 17651424. Its totient is φ = 3362160.

The previous prime is 8405417. The next prime is 8405431. The reversal of 8405420 is 245048.

It is a hoax number, since the sum of its digits (23) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210116 + ... + 210155.

It is an arithmetic number, because the mean of its divisors is an integer number (1470952).

Almost surely, 2^8405420 is an apocalyptic number.

It is an amenable number.

8405420 is an abundant number, since it is smaller than the sum of its proper divisors (9246004).

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

8405420 is a wasteful number, since it uses less digits than its factorization.

8405420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420280 (or 420278 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 8405420 is about 2899.2102372888. The cubic root of 8405420 is about 203.3229831394.

The spelling of 8405420 in words is "eight million, four hundred five thousand, four hundred twenty".