40020355 has 4 divisors (see below), whose sum is σ = 48024432. Its totient is φ = 32016280.

The previous prime is 40020317. The next prime is 40020371. The reversal of 40020355 is 55302004.

It is a happy number.

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

It is not a de Polignac number, because 40020355 - 2¹³ = 40012163 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, 4002031 + ... + 4002040.

It is an arithmetic number, because the mean of its divisors is an integer number (12006108).

Almost surely, 2^40020355 is an apocalyptic number.

40020355 is a deficient number, since it is larger than the sum of its proper divisors (8004077).

40020355 is an equidigital number, since it uses as much as digits as its factorization.

40020355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8004076.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 40020355 is about 6326.1643197122. The cubic root of 40020355 is about 342.0531904320.

Adding to 40020355 its reverse (55302004), we get a palindrome (95322359).

The spelling of 40020355 in words is "forty million, twenty thousand, three hundred fifty-five".