4400124421 has 32 divisors (see below), whose sum is σ = 5574451968. Its totient is φ = 3373539840.

The previous prime is 4400124409. The next prime is 4400124427. The reversal of 4400124421 is 1244210044.

It is not a de Polignac number, because 4400124421 - 2⁵ = 4400124389 is a prime.

It is a super-2 number, since 2×4400124421² = 38722189840561170482, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4400124392 and 4400124401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4400124427) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3445035 + ... + 3446311.

It is an arithmetic number, because the mean of its divisors is an integer number (174201624).

Almost surely, 2^4400124421 is an apocalyptic number.

It is an amenable number.

4400124421 is a deficient number, since it is larger than the sum of its proper divisors (1174327547).

4400124421 is a wasteful number, since it uses less digits than its factorization.

4400124421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1981.

The product of its (nonzero) digits is 1024, while the sum is 22.

The square root of 4400124421 is about 66333.4336590531. The cubic root of 4400124421 is about 1638.6579866272.

Adding to 4400124421 its reverse (1244210044), we get a palindrome (5644334465).

It can be divided in two parts, 4400 and 124421, that added together give a palindrome (128821).

The spelling of 4400124421 in words is "four billion, four hundred million, one hundred twenty-four thousand, four hundred twenty-one".