8479640 has 64 divisors (see below), whose sum is σ = 21470400. Its totient is φ = 2990592.

The previous prime is 8479631. The next prime is 8479649. The reversal of 8479640 is 469748.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (8479631) and next prime (8479649).

It is a junction number, because it is equal to n+sod(n) for n = 8479594 and 8479603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8479649) 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, 11606 + ... + 12314.

It is an arithmetic number, because the mean of its divisors is an integer number (335475).

Almost surely, 2^8479640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8479640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10735200).

8479640 is an abundant number, since it is smaller than the sum of its proper divisors (12990760).

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

8479640 is a wasteful number, since it uses less digits than its factorization.

8479640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 8479640 is about 2911.9821428024. The cubic root of 8479640 is about 203.9196787469.

It can be divided in two parts, 8479 and 640, that added together give a palindrome (9119).

The spelling of 8479640 in words is "eight million, four hundred seventy-nine thousand, six hundred forty".