40006289 has 4 divisors (see below), whose sum is σ = 40026624. Its totient is φ = 39985956.

The previous prime is 40006277. The next prime is 40006313. The reversal of 40006289 is 98260004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40006289 - 2⁴ = 40006273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40003289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6857 + ... + 11270.

It is an arithmetic number, because the mean of its divisors is an integer number (10006656).

Almost surely, 2^40006289 is an apocalyptic number.

It is an amenable number.

40006289 is a deficient number, since it is larger than the sum of its proper divisors (20335).

40006289 is a wasteful number, since it uses less digits than its factorization.

40006289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20334.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 40006289 is about 6325.0524899008. The cubic root of 40006289 is about 342.0131117940.

The spelling of 40006289 in words is "forty million, six thousand, two hundred eighty-nine".