40658378 has 4 divisors (see below), whose sum is σ = 60987570. Its totient is φ = 20329188.

The previous prime is 40658357. The next prime is 40658393. The reversal of 40658378 is 87385604.

It is a happy number.

40658378 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 30880249 + 9778129 = 5557^2 + 3127^2 .

It is a Curzon number.

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 as a sum of consecutive naturals, namely, 10164593 + ... + 10164596.

Almost surely, 2^40658378 is an apocalyptic number.

40658378 is a deficient number, since it is larger than the sum of its proper divisors (20329192).

40658378 is a wasteful number, since it uses less digits than its factorization.

40658378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20329191.

The product of its (nonzero) digits is 161280, while the sum is 41.

The square root of 40658378 is about 6376.3922401308. The cubic root of 40658378 is about 343.8613387881.

The spelling of 40658378 in words is "forty million, six hundred fifty-eight thousand, three hundred seventy-eight".