40578 has 8 divisors (see below), whose sum is σ = 81168. Its totient is φ = 13524.

The previous prime is 40577. The next prime is 40583. The reversal of 40578 is 87504.

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

40578 is an admirable number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3376 + ... + 3387.

It is an arithmetic number, because the mean of its divisors is an integer number (10146).

2⁴⁰⁵⁷⁸ is an apocalyptic number.

40578 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40584).

40578 is a wasteful number, since it uses less digits than its factorization.

40578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6768.

The product of its (nonzero) digits is 1120, while the sum is 24.

The square root of 40578 is about 201.4398173152. The cubic root of 40578 is about 34.3634594869.

The spelling of 40578 in words is "forty thousand, five hundred seventy-eight".