40240313 has 4 divisors (see below), whose sum is σ = 41627940. Its totient is φ = 38852688.

The previous prime is 40240261. The next prime is 40240339. The reversal of 40240313 is 31304204.

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 11478544 + 28761769 = 3388^2 + 5363^2 .

It is a cyclic number.

It is not a de Polignac number, because 40240313 - 2²² = 36046009 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40240291 and 40240300.

It is not an unprimeable number, because it can be changed into a prime (40240373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 693770 + ... + 693827.

It is an arithmetic number, because the mean of its divisors is an integer number (10406985).

Almost surely, 2^40240313 is an apocalyptic number.

It is an amenable number.

40240313 is a deficient number, since it is larger than the sum of its proper divisors (1387627).

40240313 is a wasteful number, since it uses less digits than its factorization.

40240313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387626.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 40240313 is about 6343.5252817341. The cubic root of 40240313 is about 342.6787047598.

Adding to 40240313 its reverse (31304204), we get a palindrome (71544517).

The spelling of 40240313 in words is "forty million, two hundred forty thousand, three hundred thirteen".