40644164 has 48 divisors (see below), whose sum is σ = 80015040. Its totient is φ = 17909760.

The previous prime is 40644139. The next prime is 40644169. The reversal of 40644164 is 46144604.

It is not an unprimeable number, because it can be changed into a prime (40644169) 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 15 ways as a sum of consecutive naturals, for example, 379799 + ... + 379905.

It is an arithmetic number, because the mean of its divisors is an integer number (1666980).

Almost surely, 2^40644164 is an apocalyptic number.

40644164 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

40644164 is a deficient number, since it is larger than the sum of its proper divisors (39370876).

40644164 is a wasteful number, since it uses less digits than its factorization.

40644164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 308 (or 306 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 29.

The square root of 40644164 is about 6375.2775625850. The cubic root of 40644164 is about 343.8212632859.

Adding to 40644164 its reverse (46144604), we get a palindrome (86788768).

It can be divided in two parts, 4064 and 4164, that added together give a palindrome (8228).

The spelling of 40644164 in words is "forty million, six hundred forty-four thousand, one hundred sixty-four".