8440506 has 24 divisors (see below), whose sum is σ = 18735444. Its totient is φ = 2744640.

The previous prime is 8440499. The next prime is 8440507. The reversal of 8440506 is 6050448.

It can be written as a sum of positive squares in 2 ways, for example, as 7241481 + 1199025 = 2691^2 + 1095^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 8440506.

It is not an unprimeable number, because it can be changed into a prime (8440507) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4981 + ... + 6456.

Almost surely, 2^8440506 is an apocalyptic number.

8440506 is an abundant number, since it is smaller than the sum of its proper divisors (10294938).

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

8440506 is a wasteful number, since it uses less digits than its factorization.

8440506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11486 (or 11483 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 8440506 is about 2905.2548941530. The cubic root of 8440506 is about 203.6054947870.

The spelling of 8440506 in words is "eight million, four hundred forty thousand, five hundred six".