40493945 has 4 divisors (see below), whose sum is σ = 48592740. Its totient is φ = 32395152.

The previous prime is 40493933. The next prime is 40493951. The reversal of 40493945 is 54939404.

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 29116816 + 11377129 = 5396^2 + 3373^2 .

It is a cyclic number.

It is not a de Polignac number, because 40493945 - 2¹² = 40489849 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40493899 and 40493908.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4049390 + ... + 4049399.

It is an arithmetic number, because the mean of its divisors is an integer number (12148185).

Almost surely, 2^40493945 is an apocalyptic number.

It is an amenable number.

40493945 is a deficient number, since it is larger than the sum of its proper divisors (8098795).

40493945 is an equidigital number, since it uses as much as digits as its factorization.

40493945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8098794.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 40493945 is about 6363.4852871677. The cubic root of 40493945 is about 343.3971577285.

It can be divided in two parts, 404 and 93945, that added together give a palindrome (94349).

The spelling of 40493945 in words is "forty million, four hundred ninety-three thousand, nine hundred forty-five".