40646042 has 4 divisors (see below), whose sum is σ = 60969066. Its totient is φ = 20323020.

The previous prime is 40646041. The next prime is 40646059. The reversal of 40646042 is 24064604.

40646042 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., 26122321 + 14523721 = 5111^2 + 3811^2 .

It is not an unprimeable number, because it can be changed into a prime (40646041) by changing a digit.

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, 10161509 + ... + 10161512.

Almost surely, 2^40646042 is an apocalyptic number.

40646042 is a deficient number, since it is larger than the sum of its proper divisors (20323024).

40646042 is a wasteful number, since it uses less digits than its factorization.

40646042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20323023.

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 40646042 is about 6375.4248485885. The cubic root of 40646042 is about 343.8265587275.

The spelling of 40646042 in words is "forty million, six hundred forty-six thousand, forty-two".