4238864421 has 16 divisors (see below), whose sum is σ = 6166714368. Its totient is φ = 2568553200.

The previous prime is 4238864407. The next prime is 4238864467. The reversal of 4238864421 is 1244688324.

It is a happy number.

It is not a de Polignac number, because 4238864421 - 2⁷ = 4238864293 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4238864221) 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, 332556 + ... + 345066.

It is an arithmetic number, because the mean of its divisors is an integer number (385419648).

Almost surely, 2^4238864421 is an apocalyptic number.

It is an amenable number.

4238864421 is a deficient number, since it is larger than the sum of its proper divisors (1927849947).

4238864421 is a wasteful number, since it uses less digits than its factorization.

4238864421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22792.

The product of its digits is 294912, while the sum is 42.

The square root of 4238864421 is about 65106.5620425468. The cubic root of 4238864421 is about 1618.3899592198.

The spelling of 4238864421 in words is "four billion, two hundred thirty-eight million, eight hundred sixty-four thousand, four hundred twenty-one".