40904993 has 8 divisors (see below), whose sum is σ = 43217280. Its totient is φ = 38652880.

The previous prime is 40904989. The next prime is 40905001. The reversal of 40904993 is 39940904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 40904993 - 2² = 40904989 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40904933) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13643 + ... + 16368.

It is an arithmetic number, because the mean of its divisors is an integer number (5402160).

Almost surely, 2^40904993 is an apocalyptic number.

It is an amenable number.

40904993 is a deficient number, since it is larger than the sum of its proper divisors (2312287).

40904993 is a wasteful number, since it uses less digits than its factorization.

40904993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30087.

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 40904993 is about 6395.7011343558. The cubic root of 40904993 is about 344.5551726982. Note that the first 3 decimals are identical.

The spelling of 40904993 in words is "forty million, nine hundred four thousand, nine hundred ninety-three".