4402432021 has 8 divisors (see below), whose sum is σ = 4746438144. Its totient is φ = 4059191280.

The previous prime is 4402432019. The next prime is 4402432039. The reversal of 4402432021 is 1202342044.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4402432021 - 2¹ = 4402432019 is a prime.

It is a super-2 number, since 2×4402432021² = 38762815399052288882, 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 = 4402431983 and 4402432001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4402432061) 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, 179365 + ... + 202426.

It is an arithmetic number, because the mean of its divisors is an integer number (593304768).

Almost surely, 2^4402432021 is an apocalyptic number.

It is an amenable number.

4402432021 is a deficient number, since it is larger than the sum of its proper divisors (344006123).

4402432021 is a wasteful number, since it uses less digits than its factorization.

4402432021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382691.

The product of its (nonzero) digits is 1536, while the sum is 22.

The square root of 4402432021 is about 66350.8253226740. The cubic root of 4402432021 is about 1638.9443956744.

Adding to 4402432021 its reverse (1202342044), we get a palindrome (5604774065).

The spelling of 4402432021 in words is "four billion, four hundred two million, four hundred thirty-two thousand, twenty-one".