44220040 has 16 divisors (see below), whose sum is σ = 99495180. Its totient is φ = 17688000.

The previous prime is 44220037. The next prime is 44220047. The reversal of 44220040 is 4002244.

It can be written as a sum of positive squares in 2 ways, for example, as 40525956 + 3694084 = 6366^2 + 1922^2 .

It is a junction number, because it is equal to n+sod(n) for n = 44219996 and 44220023.

It is not an unprimeable number, because it can be changed into a prime (44220047) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 552711 + ... + 552790.

Almost surely, 2^44220040 is an apocalyptic number.

44220040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

44220040 is an abundant number, since it is smaller than the sum of its proper divisors (55275140).

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

44220040 is a wasteful number, since it uses less digits than its factorization.

44220040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1105512 (or 1105508 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 16.

The square root of 44220040 is about 6649.8150350217. The cubic root of 44220040 is about 353.6223536096.

Adding to 44220040 its reverse (4002244), we get a palindrome (48222284).

The spelling of 44220040 in words is "forty-four million, two hundred twenty thousand, forty".