28553226 has 48 divisors (see below), whose sum is σ = 64035360. Its totient is φ = 8473920.

The previous prime is 28553209. The next prime is 28553249. The reversal of 28553226 is 62235582.

It is a Curzon number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 28921 + ... + 29891.

It is an arithmetic number, because the mean of its divisors is an integer number (1334070).

Almost surely, 2^28553226 is an apocalyptic number.

28553226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 28553226, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32017680).

28553226 is an abundant number, since it is smaller than the sum of its proper divisors (35482134).

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

28553226 is a wasteful number, since it uses less digits than its factorization.

28553226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1031 (or 1018 counting only the distinct ones).

The product of its digits is 28800, while the sum is 33.

The square root of 28553226 is about 5343.5218723235. The cubic root of 28553226 is about 305.6457731959.

The spelling of 28553226 in words is "twenty-eight million, five hundred fifty-three thousand, two hundred twenty-six".