28421226 has 32 divisors (see below), whose sum is σ = 66484800. Its totient is φ = 8974800.

The previous prime is 28421221. The next prime is 28421227. The reversal of 28421226 is 62212482.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 28421226.

It is not an unprimeable number, because it can be changed into a prime (28421221) 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 15 ways as a sum of consecutive naturals, for example, 12825 + ... + 14876.

It is an arithmetic number, because the mean of its divisors is an integer number (2077650).

Almost surely, 2^28421226 is an apocalyptic number.

28421226 is an abundant number, since it is smaller than the sum of its proper divisors (38063574).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28421226 is a wasteful number, since it uses less digits than its factorization.

28421226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27731 (or 27725 counting only the distinct ones).

The product of its digits is 3072, while the sum is 27.

The square root of 28421226 is about 5331.1561597837. The cubic root of 28421226 is about 305.1740509754.

The spelling of 28421226 in words is "twenty-eight million, four hundred twenty-one thousand, two hundred twenty-six".