40740217 has 6 divisors (see below), whose sum is σ = 47391738. Its totient is φ = 34920144.

The previous prime is 40740209. The next prime is 40740233. The reversal of 40740217 is 71204704.

It can be written as a sum of positive squares in only one way, i.e., 31595641 + 9144576 = 5621^2 + 3024^2 .

It is not a de Polignac number, because 40740217 - 2³ = 40740209 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40740191 and 40740200.

It is not an unprimeable number, because it can be changed into a prime (40740317) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 415668 + ... + 415765.

It is an arithmetic number, because the mean of its divisors is an integer number (7898623).

Almost surely, 2^40740217 is an apocalyptic number.

It is an amenable number.

40740217 is a deficient number, since it is larger than the sum of its proper divisors (6651521).

40740217 is an equidigital number, since it uses as much as digits as its factorization.

40740217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 831447 (or 831440 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 25.

The square root of 40740217 is about 6382.8063577082. The cubic root of 40740217 is about 344.0918973202.

The spelling of 40740217 in words is "forty million, seven hundred forty thousand, two hundred seventeen".