40949978 has 16 divisors (see below), whose sum is σ = 64782720. Its totient is φ = 19359936.

The previous prime is 40949969. The next prime is 40949981. The reversal of 40949978 is 87994904.

40949978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36575 + ... + 37677.

It is an arithmetic number, because the mean of its divisors is an integer number (4048920).

Almost surely, 2^40949978 is an apocalyptic number.

40949978 is a deficient number, since it is larger than the sum of its proper divisors (23832742).

40949978 is a wasteful number, since it uses less digits than its factorization.

40949978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2101.

The product of its (nonzero) digits is 653184, while the sum is 50.

The square root of 40949978 is about 6399.2169833504. The cubic root of 40949978 is about 344.6814338612.

The spelling of 40949978 in words is "forty million, nine hundred forty-nine thousand, nine hundred seventy-eight".