40644374 has 16 divisors (see below), whose sum is σ = 62636112. Its totient is φ = 19769568.

The previous prime is 40644371. The next prime is 40644377. The reversal of 40644374 is 47344604.

40644374 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (40644371) and next prime (40644377).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 40644374.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40644371) 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 7 ways as a sum of consecutive naturals, for example, 24392 + ... + 26004.

It is an arithmetic number, because the mean of its divisors is an integer number (3914757).

Almost surely, 2^40644374 is an apocalyptic number.

40644374 is a deficient number, since it is larger than the sum of its proper divisors (21991738).

40644374 is a wasteful number, since it uses less digits than its factorization.

40644374 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1951.

The product of its (nonzero) digits is 32256, while the sum is 32.

The square root of 40644374 is about 6375.2940324349. The cubic root of 40644374 is about 343.8218554360.

Adding to 40644374 its reverse (47344604), we get a palindrome (87988978).

The spelling of 40644374 in words is "forty million, six hundred forty-four thousand, three hundred seventy-four".