8312240 has 20 divisors (see below), whose sum is σ = 19326144. Its totient is φ = 3324864.

The previous prime is 8312237. The next prime is 8312243. The reversal of 8312240 is 422138.

It is an interprime number because it is at equal distance from previous prime (8312237) and next prime (8312243).

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (8312243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51872 + ... + 52031.

Almost surely, 2^8312240 is an apocalyptic number.

8312240 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8312240 is an abundant number, since it is smaller than the sum of its proper divisors (11013904).

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

8312240 is a wasteful number, since it uses less digits than its factorization.

8312240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103916 (or 103910 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 8312240 is about 2883.0955585967. The cubic root of 8312240 is about 202.5688634359.

Adding to 8312240 its reverse (422138), we get a palindrome (8734378).

The spelling of 8312240 in words is "eight million, three hundred twelve thousand, two hundred forty".