28414221 has 8 divisors (see below), whose sum is σ = 41329824. Its totient is φ = 17220720.

The previous prime is 28414219. The next prime is 28414237. The reversal of 28414221 is 12241482.

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

It is not a de Polignac number, because 28414221 - 2¹ = 28414219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28414191 and 28414200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28414121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 430486 + ... + 430551.

It is an arithmetic number, because the mean of its divisors is an integer number (5166228).

Almost surely, 2^28414221 is an apocalyptic number.

It is an amenable number.

28414221 is a deficient number, since it is larger than the sum of its proper divisors (12915603).

28414221 is a wasteful number, since it uses less digits than its factorization.

28414221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861051.

The product of its digits is 1024, while the sum is 24.

The square root of 28414221 is about 5330.4991323515. The cubic root of 28414221 is about 305.1489767593.

The spelling of 28414221 in words is "twenty-eight million, four hundred fourteen thousand, two hundred twenty-one".