40400312 has 8 divisors (see below), whose sum is σ = 75750600. Its totient is φ = 20200152.

The previous prime is 40400299. The next prime is 40400323. The reversal of 40400312 is 21300404.

40400312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2525012 + ... + 2525027.

It is an arithmetic number, because the mean of its divisors is an integer number (9468825).

Almost surely, 2^40400312 is an apocalyptic number.

It is an amenable number.

40400312 is a deficient number, since it is larger than the sum of its proper divisors (35350288).

40400312 is a wasteful number, since it uses less digits than its factorization.

40400312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050045 (or 5050041 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 40400312 is about 6356.1239761351. The cubic root of 40400312 is about 343.1322776306.

Adding to 40400312 its reverse (21300404), we get a palindrome (61700716).

The spelling of 40400312 in words is "forty million, four hundred thousand, three hundred twelve".