40320217 has 8 divisors (see below), whose sum is σ = 46230912. Its totient is φ = 34447200.

The previous prime is 40320211. The next prime is 40320221. The reversal of 40320217 is 71202304.

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

It is a cyclic number.

It is not a de Polignac number, because 40320217 - 2¹⁵ = 40287449 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40320194 and 40320203.

It is not an unprimeable number, because it can be changed into a prime (40320211) 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, 7084 + ... + 11437.

It is an arithmetic number, because the mean of its divisors is an integer number (5778864).

Almost surely, 2^40320217 is an apocalyptic number.

It is an amenable number.

40320217 is a deficient number, since it is larger than the sum of its proper divisors (5910695).

40320217 is a wasteful number, since it uses less digits than its factorization.

40320217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18839.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 40320217 is about 6349.8202336759. The cubic root of 40320217 is about 342.9053704562.

The spelling of 40320217 in words is "forty million, three hundred twenty thousand, two hundred seventeen".