40864287 has 4 divisors (see below), whose sum is σ = 54485720. Its totient is φ = 27242856.

The previous prime is 40864279. The next prime is 40864309. The reversal of 40864287 is 78246804.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 40864287 - 2³ = 40864279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40864207) 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, 6810712 + ... + 6810717.

It is an arithmetic number, because the mean of its divisors is an integer number (13621430).

Almost surely, 2^40864287 is an apocalyptic number.

40864287 is a deficient number, since it is larger than the sum of its proper divisors (13621433).

40864287 is a wasteful number, since it uses less digits than its factorization.

40864287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13621432.

The product of its (nonzero) digits is 86016, while the sum is 39.

The square root of 40864287 is about 6392.5180484689. The cubic root of 40864287 is about 344.4408417668.

The spelling of 40864287 in words is "forty million, eight hundred sixty-four thousand, two hundred eighty-seven".