40444521 has 16 divisors (see below), whose sum is σ = 61131840. Its totient is φ = 23578560.

The previous prime is 40444517. The next prime is 40444543. The reversal of 40444521 is 12544404.

It is a happy number.

It is not a de Polignac number, because 40444521 - 2² = 40444517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40444491 and 40444500.

It is not an unprimeable number, because it can be changed into a prime (40444321) 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, 26550 + ... + 28031.

It is an arithmetic number, because the mean of its divisors is an integer number (3820740).

Almost surely, 2^40444521 is an apocalyptic number.

It is an amenable number.

40444521 is a deficient number, since it is larger than the sum of its proper divisors (20687319).

40444521 is a wasteful number, since it uses less digits than its factorization.

40444521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54616.

The product of its (nonzero) digits is 2560, while the sum is 24.

The square root of 40444521 is about 6359.6006950122. The cubic root of 40444521 is about 343.2573922173.

Adding to 40444521 its reverse (12544404), we get a palindrome (52988925).

The spelling of 40444521 in words is "forty million, four hundred forty-four thousand, five hundred twenty-one".