40236993 has 20 divisors (see below), whose sum is σ = 60308820. Its totient is φ = 26734752.

The previous prime is 40236971. The next prime is 40237009. The reversal of 40236993 is 39963204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 17740944 + 22496049 = 4212^2 + 4743^2 .

It is not a de Polignac number, because 40236993 - 2⁶ = 40236929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40236953) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 30871 + ... + 32147.

It is an arithmetic number, because the mean of its divisors is an integer number (3015441).

Almost surely, 2^40236993 is an apocalyptic number.

It is an amenable number.

40236993 is a deficient number, since it is larger than the sum of its proper divisors (20071827).

40236993 is a wasteful number, since it uses less digits than its factorization.

40236993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1678 (or 1669 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 36.

The square root of 40236993 is about 6343.2635921897. The cubic root of 40236993 is about 342.6692803418.

The spelling of 40236993 in words is "forty million, two hundred thirty-six thousand, nine hundred ninety-three".