40912439 has 4 divisors (see below), whose sum is σ = 40961256. Its totient is φ = 40863624.

The previous prime is 40912433. The next prime is 40912451. The reversal of 40912439 is 93421904.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40912439 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40912433) 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, 23129 + ... + 24834.

It is an arithmetic number, because the mean of its divisors is an integer number (10240314).

Almost surely, 2^40912439 is an apocalyptic number.

40912439 is a deficient number, since it is larger than the sum of its proper divisors (48817).

40912439 is an equidigital number, since it uses as much as digits as its factorization.

40912439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48816.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 40912439 is about 6396.2832176194. The cubic root of 40912439 is about 344.5760780691.

The spelling of 40912439 in words is "forty million, nine hundred twelve thousand, four hundred thirty-nine".