40655993 has 8 divisors (see below), whose sum is σ = 49197312. Its totient is φ = 32798016.

The previous prime is 40655957. The next prime is 40656013. The reversal of 40655993 is 39955604.

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 40655993 - 2¹⁰ = 40654969 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40655993.

It is not an unprimeable number, because it can be changed into a prime (42655993) 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, 170705 + ... + 170942.

It is an arithmetic number, because the mean of its divisors is an integer number (6149664).

Almost surely, 2^40655993 is an apocalyptic number.

It is an amenable number.

40655993 is a deficient number, since it is larger than the sum of its proper divisors (8541319).

40655993 is a wasteful number, since it uses less digits than its factorization.

40655993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341671.

The product of its (nonzero) digits is 145800, while the sum is 41.

The square root of 40655993 is about 6376.2052194075. The cubic root of 40655993 is about 343.8546150789.

The spelling of 40655993 in words is "forty million, six hundred fifty-five thousand, nine hundred ninety-three".