28214121 has 8 divisors (see below), whose sum is σ = 40512640. Its totient is φ = 17362512.

The previous prime is 28214119. The next prime is 28214141. The reversal of 28214121 is 12141282.

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

It is not a de Polignac number, because 28214121 - 2¹ = 28214119 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28214141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 361681 + ... + 361758.

It is an arithmetic number, because the mean of its divisors is an integer number (5064080).

Almost surely, 2^28214121 is an apocalyptic number.

It is an amenable number.

28214121 is a deficient number, since it is larger than the sum of its proper divisors (12298519).

28214121 is a wasteful number, since it uses less digits than its factorization.

28214121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723455.

The product of its digits is 256, while the sum is 21.

The square root of 28214121 is about 5311.6966216078. The cubic root of 28214121 is about 304.4309770457.

The spelling of 28214121 in words is "twenty-eight million, two hundred fourteen thousand, one hundred twenty-one".