40020235 has 4 divisors (see below), whose sum is σ = 48024288. Its totient is φ = 32016184.

The previous prime is 40020221. The next prime is 40020257. The reversal of 40020235 is 53202004.

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

It is a cyclic number.

It is not a de Polignac number, because 40020235 - 2¹⁷ = 39889163 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, 4002019 + ... + 4002028.

It is an arithmetic number, because the mean of its divisors is an integer number (12006072).

Almost surely, 2^40020235 is an apocalyptic number.

40020235 is a deficient number, since it is larger than the sum of its proper divisors (8004053).

40020235 is an equidigital number, since it uses as much as digits as its factorization.

40020235 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8004052.

The product of its (nonzero) digits is 240, while the sum is 16.

The square root of 40020235 is about 6326.1548352850. The cubic root of 40020235 is about 342.0528485524.

Adding to 40020235 its reverse (53202004), we get a palindrome (93222239).

The spelling of 40020235 in words is "forty million, twenty thousand, two hundred thirty-five".