40326644 has 6 divisors (see below), whose sum is σ = 70571634. Its totient is φ = 20163320.

The previous prime is 40326631. The next prime is 40326661. The reversal of 40326644 is 44662304.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 40195600 + 131044 = 6340^2 + 362^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5040827 + ... + 5040834.

It is an arithmetic number, because the mean of its divisors is an integer number (11761939).

Almost surely, 2^40326644 is an apocalyptic number.

It is an amenable number.

40326644 is a deficient number, since it is larger than the sum of its proper divisors (30244990).

40326644 is a wasteful number, since it uses less digits than its factorization.

40326644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10081665 (or 10081663 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 29.

The square root of 40326644 is about 6350.3262908295. The cubic root of 40326644 is about 342.9235890729.

Adding to 40326644 its reverse (44662304), we get a palindrome (84988948).

The spelling of 40326644 in words is "forty million, three hundred twenty-six thousand, six hundred forty-four".