40520289 has 8 divisors (see below), whose sum is σ = 54326272. Its totient is φ = 26863920.

The previous prime is 40520281. The next prime is 40520309. The reversal of 40520289 is 98202504.

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

It is not a de Polignac number, because 40520289 - 2³ = 40520281 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40520281) 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 7 ways as a sum of consecutive naturals, for example, 36769 + ... + 37854.

It is an arithmetic number, because the mean of its divisors is an integer number (6790784).

Almost surely, 2^40520289 is an apocalyptic number.

It is an amenable number.

40520289 is a deficient number, since it is larger than the sum of its proper divisors (13805983).

40520289 is a wasteful number, since it uses less digits than its factorization.

40520289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74807.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 40520289 is about 6365.5548854754. The cubic root of 40520289 is about 343.4716091365.

The spelling of 40520289 in words is "forty million, five hundred twenty thousand, two hundred eighty-nine".