40664842 has 8 divisors (see below), whose sum is σ = 62415936. Its totient is φ = 19859532.

The previous prime is 40664837. The next prime is 40664849. The reversal of 40664842 is 24846604.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 40664798 and 40664807.

It is not an unprimeable number, because it can be changed into a prime (40664849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 236338 + ... + 236509.

It is an arithmetic number, because the mean of its divisors is an integer number (7801992).

Almost surely, 2^40664842 is an apocalyptic number.

40664842 is a deficient number, since it is larger than the sum of its proper divisors (21751094).

40664842 is a wasteful number, since it uses less digits than its factorization.

40664842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472892.

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 40664842 is about 6376.8990896830. The cubic root of 40664842 is about 343.8795605505.

The spelling of 40664842 in words is "forty million, six hundred sixty-four thousand, eight hundred forty-two".