40856369 has 4 divisors (see below), whose sum is σ = 40870260. Its totient is φ = 40842480.

The previous prime is 40856359. The next prime is 40856371. The reversal of 40856369 is 96365804.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 19465744 + 21390625 = 4412^2 + 4625^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40856369 is a prime.

It is a super-2 number, since 2×40856369² = 3338485775728322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40856329) 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, 602 + ... + 9059.

It is an arithmetic number, because the mean of its divisors is an integer number (10217565).

Almost surely, 2^40856369 is an apocalyptic number.

It is an amenable number.

40856369 is a deficient number, since it is larger than the sum of its proper divisors (13891).

40856369 is an equidigital number, since it uses as much as digits as its factorization.

40856369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13890.

The product of its (nonzero) digits is 155520, while the sum is 41.

The square root of 40856369 is about 6391.8987006992. The cubic root of 40856369 is about 344.4185936625.

The spelling of 40856369 in words is "forty million, eight hundred fifty-six thousand, three hundred sixty-nine".