44231220 has 144 divisors (see below), whose sum is σ = 148599360. Its totient is φ = 10560000.

The previous prime is 44231197. The next prime is 44231227. The reversal of 44231220 is 2213244.

44231220 is a `hidden beast` number, since 442 + 3 + 1 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 44231193 and 44231202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (44231227) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 176095 + ... + 176345.

It is an arithmetic number, because the mean of its divisors is an integer number (1031940).

Almost surely, 2^44231220 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 44231220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74299680).

44231220 is an abundant number, since it is smaller than the sum of its proper divisors (104368140).

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

44231220 is a wasteful number, since it uses less digits than its factorization.

44231220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 44231220 is about 6650.6556067804. The cubic root of 44231220 is about 353.6521528045.

Adding to 44231220 its reverse (2213244), we get a palindrome (46444464).

The spelling of 44231220 in words is "forty-four million, two hundred thirty-one thousand, two hundred twenty".