40646407 has 4 divisors (see below), whose sum is σ = 40839256. Its totient is φ = 40453560.

The previous prime is 40646401. The next prime is 40646443. The reversal of 40646407 is 70464604.

40646407 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 is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40646407 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40646401) 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 in 3 ways as a sum of consecutive naturals, for example, 96108 + ... + 96529.

It is an arithmetic number, because the mean of its divisors is an integer number (10209814).

Almost surely, 2^40646407 is an apocalyptic number.

40646407 is a deficient number, since it is larger than the sum of its proper divisors (192849).

40646407 is a wasteful number, since it uses less digits than its factorization.

40646407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192848.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 40646407 is about 6375.4534740676. The cubic root of 40646407 is about 343.8275879078.

The spelling of 40646407 in words is "forty million, six hundred forty-six thousand, four hundred seven".