8102840 has 32 divisors (see below), whose sum is σ = 18355680. Its totient is φ = 3219072.

The previous prime is 8102821. The next prime is 8102849. The reversal of 8102840 is 482018.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8102849) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6074 + ... + 7286.

It is an arithmetic number, because the mean of its divisors is an integer number (573615).

Almost surely, 2^8102840 is an apocalyptic number.

It is an amenable number.

8102840 is an abundant number, since it is smaller than the sum of its proper divisors (10252840).

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

8102840 is a wasteful number, since it uses less digits than its factorization.

8102840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1391 (or 1387 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 8102840 is about 2846.5487875671. The cubic root of 8102840 is about 200.8533537583.

Adding to 8102840 its reverse (482018), we get a palindrome (8584858).

The spelling of 8102840 in words is "eight million, one hundred two thousand, eight hundred forty".