7320312 has 48 divisors (see below), whose sum is σ = 19950840. Its totient is φ = 2424768.

The previous prime is 7320311. The next prime is 7320317. The reversal of 7320312 is 2130237.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7320311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20923 + ... + 21269.

Almost surely, 2^7320312 is an apocalyptic number.

7320312 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

7320312 is an abundant number, since it is smaller than the sum of its proper divisors (12630528).

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

7320312 is a wasteful number, since it uses less digits than its factorization.

7320312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 18.

The square root of 7320312 is about 2705.6075103385. The cubic root of 7320312 is about 194.1674962562.

Adding to 7320312 its reverse (2130237), we get a palindrome (9450549).

The spelling of 7320312 in words is "seven million, three hundred twenty thousand, three hundred twelve".