40646164 has 24 divisors (see below), whose sum is σ = 78236928. Its totient is φ = 18359520.

The previous prime is 40646161. The next prime is 40646173. The reversal of 40646164 is 46164604.

It is a super-2 number, since 2×40646164² = 3304221295829792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40646161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5872 + ... + 10759.

It is an arithmetic number, because the mean of its divisors is an integer number (3259872).

Almost surely, 2^40646164 is an apocalyptic number.

It is an amenable number.

40646164 is a deficient number, since it is larger than the sum of its proper divisors (37590764).

40646164 is a wasteful number, since it uses less digits than its factorization.

40646164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16695 (or 16693 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 40646164 is about 6375.4344165712. The cubic root of 40646164 is about 343.8269027282.

The spelling of 40646164 in words is "forty million, six hundred forty-six thousand, one hundred sixty-four".