40210644 has 48 divisors (see below), whose sum is σ = 99792000. Its totient is φ = 12558336.

The previous prime is 40210607. The next prime is 40210673. The reversal of 40210644 is 44601204.

It is a self number, because there is not a number n which added to its sum of digits gives 40210644.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 89332 + ... + 89780.

It is an arithmetic number, because the mean of its divisors is an integer number (2079000).

Almost surely, 2^40210644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40210644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49896000).

40210644 is an abundant number, since it is smaller than the sum of its proper divisors (59581356).

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

40210644 is a wasteful number, since it uses less digits than its factorization.

40210644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912 (or 910 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 40210644 is about 6341.1863243403. The cubic root of 40210644 is about 342.5944655691.

Adding to 40210644 its reverse (44601204), we get a palindrome (84811848).

The spelling of 40210644 in words is "forty million, two hundred ten thousand, six hundred forty-four".