40544421 has 8 divisors (see below), whose sum is σ = 54710880. Its totient is φ = 26703792.

The previous prime is 40544411. The next prime is 40544431. The reversal of 40544421 is 12444504.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40544411) and next prime (40544431).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40544421 - 2⁵ = 40544389 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40544391 and 40544400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40544401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81166 + ... + 81663.

It is an arithmetic number, because the mean of its divisors is an integer number (6838860).

Almost surely, 2^40544421 is an apocalyptic number.

It is an amenable number.

40544421 is a deficient number, since it is larger than the sum of its proper divisors (14166459).

40544421 is a wasteful number, since it uses less digits than its factorization.

40544421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162915.

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

The square root of 40544421 is about 6367.4501175902. The cubic root of 40544421 is about 343.5397808448.

Adding to 40544421 its reverse (12444504), we get a palindrome (52988925).

The spelling of 40544421 in words is "forty million, five hundred forty-four thousand, four hundred twenty-one".