28422251 has 12 divisors (see below), whose sum is σ = 33576840. Its totient is φ = 23849280.

The previous prime is 28422221. The next prime is 28422259. The reversal of 28422251 is 15222482.

It is not a de Polignac number, because 28422251 - 2⁶ = 28422187 is a prime.

It is a super-3 number, since 3×28422251³ (a number of 23 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28422251.

It is not an unprimeable number, because it can be changed into a prime (28422259) 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 11 ways as a sum of consecutive naturals, for example, 5786 + ... + 9503.

It is an arithmetic number, because the mean of its divisors is an integer number (2798070).

Almost surely, 2^28422251 is an apocalyptic number.

28422251 is a deficient number, since it is larger than the sum of its proper divisors (5154589).

28422251 is a wasteful number, since it uses less digits than its factorization.

28422251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15326 (or 15313 counting only the distinct ones).

The product of its digits is 2560, while the sum is 26.

The square root of 28422251 is about 5331.2522919104. The cubic root of 28422251 is about 305.1777195908.

The spelling of 28422251 in words is "twenty-eight million, four hundred twenty-two thousand, two hundred fifty-one".