44421820 has 24 divisors (see below), whose sum is σ = 94213728. Its totient is φ = 17592000.

The previous prime is 44421803. The next prime is 44421821. The reversal of 44421820 is 2812444.

It is a super-2 number, since 2×44421820² = 3946596184224800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44421821) 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, 8976 + ... + 13015.

It is an arithmetic number, because the mean of its divisors is an integer number (3925572).

Almost surely, 2^44421820 is an apocalyptic number.

It is an amenable number.

44421820 is an abundant number, since it is smaller than the sum of its proper divisors (49791908).

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

44421820 is a wasteful number, since it uses less digits than its factorization.

44421820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22101 (or 22099 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 25.

The square root of 44421820 is about 6664.9696173351. The cubic root of 44421820 is about 354.1594077097.

The spelling of 44421820 in words is "forty-four million, four hundred twenty-one thousand, eight hundred twenty".