40978 has 8 divisors (see below), whose sum is σ = 70272. Its totient is φ = 17556.

The previous prime is 40973. The next prime is 40993. The reversal of 40978 is 87904.

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

It is not an unprimeable number, because it can be changed into a prime (40973) by changing a digit.

40978 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1450 + ... + 1477.

It is an arithmetic number, because the mean of its divisors is an integer number (8784).

2⁴⁰⁹⁷⁸ is an apocalyptic number.

40978 is a deficient number, since it is larger than the sum of its proper divisors (29294).

40978 is a wasteful number, since it uses less digits than its factorization.

40978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2936.

The product of its (nonzero) digits is 2016, while the sum is 28.

The square root of 40978 is about 202.4302348959. The cubic root of 40978 is about 34.4760037573.

The spelling of 40978 in words is "forty thousand, nine hundred seventy-eight".