44121220 has 48 divisors (see below), whose sum is σ = 108859968. Its totient is φ = 14808960.

The previous prime is 44121167. The next prime is 44121227. The reversal of 44121220 is 2212144.

It is a junction number, because it is equal to n+sod(n) for n = 44121194 and 44121203.

It is not an unprimeable number, because it can be changed into a prime (44121227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4854 + ... + 10573.

It is an arithmetic number, because the mean of its divisors is an integer number (2267916).

Almost surely, 2^44121220 is an apocalyptic number.

It is an amenable number.

44121220 is an abundant number, since it is smaller than the sum of its proper divisors (64738748).

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

44121220 is a wasteful number, since it uses less digits than its factorization.

44121220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15460 (or 15458 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 44121220 is about 6642.3805973461. The cubic root of 44121220 is about 353.3587399159.

Adding to 44121220 its reverse (2212144), we get a palindrome (46333364).

The spelling of 44121220 in words is "forty-four million, one hundred twenty-one thousand, two hundred twenty".