40680369 has 12 divisors (see below), whose sum is σ = 59191236. Its totient is φ = 26921472.

The previous prime is 40680361. The next prime is 40680379. The reversal of 40680369 is 96308604.

It can be written as a sum of positive squares in 2 ways, for example, as 11390625 + 29289744 = 3375^2 + 5412^2 .

It is not a de Polignac number, because 40680369 - 2³ = 40680361 is a prime.

It is a super-2 number, since 2×40680369² = 3309784843952322, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40680361) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15264 + ... + 17729.

It is an arithmetic number, because the mean of its divisors is an integer number (4932603).

Almost surely, 2^40680369 is an apocalyptic number.

It is an amenable number.

40680369 is a deficient number, since it is larger than the sum of its proper divisors (18510867).

40680369 is a wasteful number, since it uses less digits than its factorization.

40680369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33136 (or 33133 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 40680369 is about 6378.1164147419. The cubic root of 40680369 is about 343.9233226657.

The spelling of 40680369 in words is "forty million, six hundred eighty thousand, three hundred sixty-nine".