40405312 has 28 divisors (see below), whose sum is σ = 80650080. Its totient is φ = 20084096.

The previous prime is 40405237. The next prime is 40405331. The reversal of 40405312 is 21350404.

It is a self number, because there is not a number n which added to its sum of digits gives 40405312.

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, 9693 + ... + 13219.

It is an arithmetic number, because the mean of its divisors is an integer number (2880360).

Almost surely, 2^40405312 is an apocalyptic number.

It is an amenable number.

40405312 is a deficient number, since it is larger than the sum of its proper divisors (40244768).

40405312 is a wasteful number, since it uses less digits than its factorization.

40405312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3718 (or 3708 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 40405312 is about 6356.5172854323. The cubic root of 40405312 is about 343.1464325594.

Adding to 40405312 its reverse (21350404), we get a palindrome (61755716).

The spelling of 40405312 in words is "forty million, four hundred five thousand, three hundred twelve".