8180240 has 20 divisors (see below), whose sum is σ = 19019244. Its totient is φ = 3272064.

The previous prime is 8180239. The next prime is 8180251. The reversal of 8180240 is 420818.

It can be written as a sum of positive squares in 2 ways, for example, as 5607424 + 2572816 = 2368^2 + 1604^2 .

It is a tau number, because it is divible by the number of its divisors (20).

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, 51047 + ... + 51206.

Almost surely, 2^8180240 is an apocalyptic number.

8180240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8180240 is an abundant number, since it is smaller than the sum of its proper divisors (10839004).

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

8180240 is a wasteful number, since it uses less digits than its factorization.

8180240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102266 (or 102260 counting only the distinct ones).

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

The square root of 8180240 is about 2860.1118859233. Note that the first 3 decimals coincide. The cubic root of 8180240 is about 201.4908590820.

The spelling of 8180240 in words is "eight million, one hundred eighty thousand, two hundred forty".