8426840 has 16 divisors (see below), whose sum is σ = 18960480. Its totient is φ = 3370720.

The previous prime is 8426827. The next prime is 8426863. The reversal of 8426840 is 486248.

It is a d-powerful number, because it can be written as 8 + 4³ + 2²³ + 6⁴ + 8⁵ + 4⁶ + 0 .

It is a junction number, because it is equal to n+sod(n) for n = 8426797 and 8426806.

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, 105296 + ... + 105375.

It is an arithmetic number, because the mean of its divisors is an integer number (1185030).

Almost surely, 2^8426840 is an apocalyptic number.

It is an amenable number.

8426840 is an abundant number, since it is smaller than the sum of its proper divisors (10533640).

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

8426840 is a wasteful number, since it uses less digits than its factorization.

8426840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210682 (or 210678 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 8426840 is about 2902.9019962789. The cubic root of 8426840 is about 203.4955497299.

The spelling of 8426840 in words is "eight million, four hundred twenty-six thousand, eight hundred forty".