40320287 has 12 divisors (see below), whose sum is σ = 47175480. Its totient is φ = 34359696.

The previous prime is 40320271. The next prime is 40320289. The reversal of 40320287 is 78202304.

It is not a de Polignac number, because 40320287 - 2⁴ = 40320271 is a prime.

It is a super-3 number, since 3×40320287³ (a number of 24 digits) contains 333 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 (40320289) 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, 6473 + ... + 11069.

It is an arithmetic number, because the mean of its divisors is an integer number (3931290).

Almost surely, 2^40320287 is an apocalyptic number.

40320287 is a deficient number, since it is larger than the sum of its proper divisors (6855193).

40320287 is a wasteful number, since it uses less digits than its factorization.

40320287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4790 (or 4783 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 40320287 is about 6349.8257456406. The cubic root of 40320287 is about 342.9055688956.

The spelling of 40320287 in words is "forty million, three hundred twenty thousand, two hundred eighty-seven".