40320312 has 16 divisors (see below), whose sum is σ = 100800840. Its totient is φ = 13440096.

The previous prime is 40320307. The next prime is 40320323. The reversal of 40320312 is 21302304.

It is a junction number, because it is equal to n+sod(n) for n = 40320291 and 40320300.

It is a congruent number.

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, 839983 + ... + 840030.

Almost surely, 2^40320312 is an apocalyptic number.

It is an amenable number.

40320312 is an abundant number, since it is smaller than the sum of its proper divisors (60480528).

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

40320312 is a wasteful number, since it uses less digits than its factorization.

40320312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1680022 (or 1680018 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 15.

The square root of 40320312 is about 6349.8277141982. The cubic root of 40320312 is about 342.9056397668.

Adding to 40320312 its reverse (21302304), we get a palindrome (61622616).

The spelling of 40320312 in words is "forty million, three hundred twenty thousand, three hundred twelve".