40020269 has 4 divisors (see below), whose sum is σ = 40195260. Its totient is φ = 39845280.

The previous prime is 40020257. The next prime is 40020271. The reversal of 40020269 is 96202004.

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 18164644 + 21855625 = 4262^2 + 4675^2 .

It is a cyclic number.

It is not a de Polignac number, because 40020269 - 2¹² = 40016173 is a prime.

It is a super-2 number, since 2×40020269² = 3203243861664722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40020769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87152 + ... + 87609.

It is an arithmetic number, because the mean of its divisors is an integer number (10048815).

Almost surely, 2^40020269 is an apocalyptic number.

It is an amenable number.

40020269 is a deficient number, since it is larger than the sum of its proper divisors (174991).

40020269 is a wasteful number, since it uses less digits than its factorization.

40020269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174990.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 40020269 is about 6326.1575225408. The cubic root of 40020269 is about 342.0529454184.

The spelling of 40020269 in words is "forty million, twenty thousand, two hundred sixty-nine".