40223578 has 4 divisors (see below), whose sum is σ = 60335370. Its totient is φ = 20111788.

The previous prime is 40223569. The next prime is 40223591. The reversal of 40223578 is 87532204.

40223578 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., 37982569 + 2241009 = 6163^2 + 1497^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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, 10055893 + ... + 10055896.

Almost surely, 2^40223578 is an apocalyptic number.

40223578 is a deficient number, since it is larger than the sum of its proper divisors (20111792).

40223578 is a wasteful number, since it uses less digits than its factorization.

40223578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20111791.

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 40223578 is about 6342.2060830597. The cubic root of 40223578 is about 342.6311941677.

The spelling of 40223578 in words is "forty million, two hundred twenty-three thousand, five hundred seventy-eight".