44040421 has 6 divisors (see below), whose sum is σ = 46783730. Its totient is φ = 41449536.

The previous prime is 44040419. The next prime is 44040439. The reversal of 44040421 is 12404044.

It can be written as a sum of positive squares in 3 ways, for example, as 32649796 + 11390625 = 5714^2 + 3375^2 .

It is not a de Polignac number, because 44040421 - 2¹ = 44040419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44040121) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 75906 + ... + 76483.

Almost surely, 2^44040421 is an apocalyptic number.

It is an amenable number.

44040421 is a deficient number, since it is larger than the sum of its proper divisors (2743309).

44040421 is a wasteful number, since it uses less digits than its factorization.

44040421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152423 (or 152406 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 19.

The square root of 44040421 is about 6636.2957287933. The cubic root of 44040421 is about 353.1429066650.

Adding to 44040421 its reverse (12404044), we get a palindrome (56444465).

The spelling of 44040421 in words is "forty-four million, forty thousand, four hundred twenty-one".