8478140 has 48 divisors (see below), whose sum is σ = 19686240. Its totient is φ = 3041280.

The previous prime is 8478137. The next prime is 8478149. The reversal of 8478140 is 418748.

8478140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 8478097 and 8478106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8478149) 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, 19364 + ... + 19796.

It is an arithmetic number, because the mean of its divisors is an integer number (410130).

Almost surely, 2^8478140 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 8478140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9843120).

8478140 is an abundant number, since it is smaller than the sum of its proper divisors (11208100).

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

8478140 is a wasteful number, since it uses less digits than its factorization.

8478140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542 (or 540 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 32.

The square root of 8478140 is about 2911.7245748868. The cubic root of 8478140 is about 203.9076539615.

The spelling of 8478140 in words is "eight million, four hundred seventy-eight thousand, one hundred forty".