40020353 has 8 divisors (see below), whose sum is σ = 40993128. Its totient is φ = 39055744.

The previous prime is 40020317. The next prime is 40020371. The reversal of 40020353 is 35302004.

It can be written as a sum of positive squares in 4 ways, for example, as 15745024 + 24275329 = 3968^2 + 4927^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40020353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40020853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8525 + ... + 12357.

It is an arithmetic number, because the mean of its divisors is an integer number (5124141).

Almost surely, 2^40020353 is an apocalyptic number.

It is an amenable number.

40020353 is a deficient number, since it is larger than the sum of its proper divisors (972775).

40020353 is a wasteful number, since it uses less digits than its factorization.

40020353 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4083.

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 40020353 is about 6326.1641616386. The cubic root of 40020353 is about 342.0531847340.

Adding to 40020353 its reverse (35302004), we get a palindrome (75322357).

The spelling of 40020353 in words is "forty million, twenty thousand, three hundred fifty-three".