421728853 has 24 divisors (see below), whose sum is σ = 529358976. Its totient is φ = 328910400.

The previous prime is 421728841. The next prime is 421728859. The reversal of 421728853 is 358827124.

It is a happy number.

It is not a de Polignac number, because 421728853 - 2²⁵ = 388174421 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 (421728859) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 81483 + ... + 86503.

It is an arithmetic number, because the mean of its divisors is an integer number (22056624).

Almost surely, 2^421728853 is an apocalyptic number.

It is an amenable number.

421728853 is a deficient number, since it is larger than the sum of its proper divisors (107630123).

421728853 is a wasteful number, since it uses less digits than its factorization.

421728853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5125 (or 5112 counting only the distinct ones).

The product of its digits is 107520, while the sum is 40.

The square root of 421728853 is about 20536.0379090028. The cubic root of 421728853 is about 749.9133843677.

The spelling of 421728853 in words is "four hundred twenty-one million, seven hundred twenty-eight thousand, eight hundred fifty-three".