8428340 has 12 divisors (see below), whose sum is σ = 17699556. Its totient is φ = 3371328.

The previous prime is 8428337. The next prime is 8428351. The reversal of 8428340 is 438248.

8428340 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4571044 + 3857296 = 2138^2 + 1964^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210689 + ... + 210728.

It is an arithmetic number, because the mean of its divisors is an integer number (1474963).

Almost surely, 2^8428340 is an apocalyptic number.

It is an amenable number.

8428340 is an abundant number, since it is smaller than the sum of its proper divisors (9271216).

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

8428340 is a wasteful number, since it uses less digits than its factorization.

8428340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421426 (or 421424 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 29.

The square root of 8428340 is about 2903.1603469323. The cubic root of 8428340 is about 203.5076232638.

The spelling of 8428340 in words is "eight million, four hundred twenty-eight thousand, three hundred forty".