8279840 has 24 divisors (see below), whose sum is σ = 19561500. Its totient is φ = 3311872.

The previous prime is 8279837. The next prime is 8279857. The reversal of 8279840 is 489728.

It can be written as a sum of positive squares in 2 ways, for example, as 8271376 + 8464 = 2876^2 + 92^2 .

It is a junction number, because it is equal to n+sod(n) for n = 8279794 and 8279803.

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, 25715 + ... + 26034.

Almost surely, 2^8279840 is an apocalyptic number.

8279840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8279840 is an abundant number, since it is smaller than the sum of its proper divisors (11281660).

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

8279840 is a wasteful number, since it uses less digits than its factorization.

8279840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51764 (or 51756 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 8279840 is about 2877.4711119314. The cubic root of 8279840 is about 202.3053252792.

It can be divided in two parts, 8279 and 840, that added together give a palindrome (9119).

The spelling of 8279840 in words is "eight million, two hundred seventy-nine thousand, eight hundred forty".