40309912 has 8 divisors (see below), whose sum is σ = 75581100. Its totient is φ = 20154952.

The previous prime is 40309897. The next prime is 40309931. The reversal of 40309912 is 21990304.

It is a happy number.

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 (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2519362 + ... + 2519377.

Almost surely, 2^40309912 is an apocalyptic number.

It is an amenable number.

40309912 is a deficient number, since it is larger than the sum of its proper divisors (35271188).

40309912 is a wasteful number, since it uses less digits than its factorization.

40309912 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5038745 (or 5038741 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 40309912 is about 6349.0087415281. The cubic root of 40309912 is about 342.8761548320.

The spelling of 40309912 in words is "forty million, three hundred nine thousand, nine hundred twelve".