40242385 has 4 divisors (see below), whose sum is σ = 48290868. Its totient is φ = 32193904.

The previous prime is 40242337. The next prime is 40242403. The reversal of 40242385 is 58324204.

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 20466576 + 19775809 = 4524^2 + 4447^2 .

It is a cyclic number.

It is not a de Polignac number, because 40242385 - 2²³ = 31853777 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 4024234 + ... + 4024243.

It is an arithmetic number, because the mean of its divisors is an integer number (12072717).

Almost surely, 2^40242385 is an apocalyptic number.

It is an amenable number.

40242385 is a deficient number, since it is larger than the sum of its proper divisors (8048483).

40242385 is an equidigital number, since it uses as much as digits as its factorization.

40242385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8048482.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 40242385 is about 6343.6885957619. The cubic root of 40242385 is about 342.6845862423.

Adding to 40242385 its reverse (58324204), we get a palindrome (98566589).

The spelling of 40242385 in words is "forty million, two hundred forty-two thousand, three hundred eighty-five".