40505312 has 24 divisors (see below), whose sum is σ = 81602136. Its totient is φ = 19780992.

The previous prime is 40505299. The next prime is 40505317. The reversal of 40505312 is 21350504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40505317) 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, 13343 + ... + 16094.

It is an arithmetic number, because the mean of its divisors is an integer number (3400089).

Almost surely, 2^40505312 is an apocalyptic number.

It is an amenable number.

40505312 is an abundant number, since it is smaller than the sum of its proper divisors (41096824).

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

40505312 is a wasteful number, since it uses less digits than its factorization.

40505312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29490 (or 29482 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 40505312 is about 6364.3783671306. The cubic root of 40505312 is about 343.4292862382.

Adding to 40505312 its reverse (21350504), we get a palindrome (61855816).

The spelling of 40505312 in words is "forty million, five hundred five thousand, three hundred twelve".