28488226 has 16 divisors (see below), whose sum is σ = 48727224. Its totient is φ = 12374784.

The previous prime is 28488217. The next prime is 28488227. The reversal of 28488226 is 62288482.

It can be written as a sum of positive squares in 4 ways, for example, as 13286025 + 15202201 = 3645^2 + 3899^2 .

It is not an unprimeable number, because it can be changed into a prime (28488227) 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, 31785 + ... + 32668.

Almost surely, 2^28488226 is an apocalyptic number.

28488226 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28488226 is a deficient number, since it is larger than the sum of its proper divisors (20238998).

28488226 is a wasteful number, since it uses less digits than its factorization.

28488226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64485.

The product of its digits is 98304, while the sum is 40.

The square root of 28488226 is about 5337.4362759662. The cubic root of 28488226 is about 305.4136678435.

The spelling of 28488226 in words is "twenty-eight million, four hundred eighty-eight thousand, two hundred twenty-six".