8206440 has 64 divisors (see below), whose sum is σ = 26861760. Its totient is φ = 1989120.

The previous prime is 8206439. The next prime is 8206447. The reversal of 8206440 is 446028.

8206440 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 8206440.

It is not an unprimeable number, because it can be changed into a prime (8206447) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1789 + ... + 4428.

It is an arithmetic number, because the mean of its divisors is an integer number (419715).

Almost surely, 2^8206440 is an apocalyptic number.

It is an amenable number.

8206440 is an abundant number, since it is smaller than the sum of its proper divisors (18655320).

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

8206440 is a wasteful number, since it uses less digits than its factorization.

8206440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6242 (or 6238 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

The square root of 8206440 is about 2864.6884647375. The cubic root of 8206440 is about 201.7057441596.

It can be divided in two parts, 8206 and 440, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 8206440 in words is "eight million, two hundred six thousand, four hundred forty".