40630393 has 4 divisors (see below), whose sum is σ = 40990068. Its totient is φ = 40270720.

The previous prime is 40630333. The next prime is 40630423. The reversal of 40630393 is 39303604.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2832489 + 37797904 = 1683^2 + 6148^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40630393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40630333) 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, 179668 + ... + 179893.

It is an arithmetic number, because the mean of its divisors is an integer number (10247517).

Almost surely, 2^40630393 is an apocalyptic number.

It is an amenable number.

40630393 is a deficient number, since it is larger than the sum of its proper divisors (359675).

40630393 is a wasteful number, since it uses less digits than its factorization.

40630393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359674.

The product of its (nonzero) digits is 5832, while the sum is 28.

The square root of 40630393 is about 6374.1974396782. The cubic root of 40630393 is about 343.7824278829.

Adding to 40630393 its reverse (39303604), we get a palindrome (79933997).

The spelling of 40630393 in words is "forty million, six hundred thirty thousand, three hundred ninety-three".