44421621 has 8 divisors (see below), whose sum is σ = 59978880. Its totient is φ = 29239392.

The previous prime is 44421617. The next prime is 44421653. The reversal of 44421621 is 12612444.

It is a happy number.

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

It is not a de Polignac number, because 44421621 - 2² = 44421617 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 44421591 and 44421600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44421691) 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, 93480 + ... + 93953.

It is an arithmetic number, because the mean of its divisors is an integer number (7497360).

Almost surely, 2^44421621 is an apocalyptic number.

It is an amenable number.

44421621 is a deficient number, since it is larger than the sum of its proper divisors (15557259).

44421621 is a wasteful number, since it uses less digits than its factorization.

44421621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187515.

The product of its digits is 1536, while the sum is 24.

The square root of 44421621 is about 6664.9546885181. The cubic root of 44421621 is about 354.1588788568.

The spelling of 44421621 in words is "forty-four million, four hundred twenty-one thousand, six hundred twenty-one".