44408421 has 6 divisors (see below), whose sum is σ = 64145510. Its totient is φ = 29605608.

The previous prime is 44408411. The next prime is 44408447. The reversal of 44408421 is 12480444.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 35640900 + 8767521 = 5970^2 + 2961^2 .

It is not a de Polignac number, because 44408421 - 2¹⁰ = 44407397 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44408401) 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, 2467126 + ... + 2467143.

Almost surely, 2^44408421 is an apocalyptic number.

It is an amenable number.

44408421 is a deficient number, since it is larger than the sum of its proper divisors (19737089).

44408421 is a wasteful number, since it uses less digits than its factorization.

44408421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4934275 (or 4934272 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 27.

The square root of 44408421 is about 6663.9643606490. The cubic root of 44408421 is about 354.1237956381.

Adding to 44408421 its reverse (12480444), we get a palindrome (56888865).

The spelling of 44408421 in words is "forty-four million, four hundred eight thousand, four hundred twenty-one".