40321312 has 24 divisors (see below), whose sum is σ = 79528176. Its totient is φ = 20123712.

The previous prime is 40321291. The next prime is 40321313. The reversal of 40321312 is 21312304.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is not an unprimeable number, because it can be changed into a prime (40321313) 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, 27543 + ... + 28969.

It is an arithmetic number, because the mean of its divisors is an integer number (3313674).

Almost surely, 2^40321312 is an apocalyptic number.

It is an amenable number.

40321312 is a deficient number, since it is larger than the sum of its proper divisors (39206864).

40321312 is a wasteful number, since it uses less digits than its factorization.

40321312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2320 (or 2312 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 40321312 is about 6349.9064560039. The cubic root of 40321312 is about 342.9084745895.

Adding to 40321312 its reverse (21312304), we get a palindrome (61633616).

It can be divided in two parts, 403213 and 12, that added together give a square (403225 = 635²).

The spelling of 40321312 in words is "forty million, three hundred twenty-one thousand, three hundred twelve".