44421636 has 72 divisors (see below), whose sum is σ = 124513536. Its totient is φ = 12277440.

The previous prime is 44421617. The next prime is 44421653. The reversal of 44421636 is 63612444.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17010 + ... + 19446.

Almost surely, 2^44421636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 44421636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (62256768).

44421636 is an abundant number, since it is smaller than the sum of its proper divisors (80091900).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

44421636 is a wasteful number, since it uses less digits than its factorization.

44421636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2489 (or 2480 counting only the distinct ones).

The product of its digits is 13824, while the sum is 30.

The square root of 44421636 is about 6664.9558138070. The cubic root of 44421636 is about 354.1589187202.

The spelling of 44421636 in words is "forty-four million, four hundred twenty-one thousand, six hundred thirty-six".