40210664 has 16 divisors (see below), whose sum is σ = 81194820. Its totient is φ = 18558720.

The previous prime is 40210607. The next prime is 40210673. The reversal of 40210664 is 46601204.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32604100 + 7606564 = 5710^2 + 2758^2 .

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 193217 + ... + 193424.

Almost surely, 2^40210664 is an apocalyptic number.

It is an amenable number.

40210664 is an abundant number, since it is smaller than the sum of its proper divisors (40984156).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40210664 is a wasteful number, since it uses less digits than its factorization.

40210664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 386660 (or 386656 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 40210664 is about 6341.1879013321. The cubic root of 40210664 is about 342.5945223691.

Adding to 40210664 its reverse (46601204), we get a palindrome (86811868).

The spelling of 40210664 in words is "forty million, two hundred ten thousand, six hundred sixty-four".