4643440421 has 8 divisors (see below), whose sum is σ = 4697831424. Its totient is φ = 4589328240.

The previous prime is 4643440387. The next prime is 4643440423. The reversal of 4643440421 is 1240443464.

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 4643440421 - 2¹⁸ = 4643178277 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4643440423) 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, 36110 + ... + 102911.

It is an arithmetic number, because the mean of its divisors is an integer number (587228928).

Almost surely, 2^4643440421 is an apocalyptic number.

It is an amenable number.

4643440421 is a deficient number, since it is larger than the sum of its proper divisors (54391003).

4643440421 is a wasteful number, since it uses less digits than its factorization.

4643440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139411.

The product of its (nonzero) digits is 36864, while the sum is 32.

The square root of 4643440421 is about 68142.7943439363. The cubic root of 4643440421 is about 1668.3223163809.

Adding to 4643440421 its reverse (1240443464), we get a palindrome (5883883885).

The spelling of 4643440421 in words is "four billion, six hundred forty-three million, four hundred forty thousand, four hundred twenty-one".