28230226 has 4 divisors (see below), whose sum is σ = 42345342. Its totient is φ = 14115112.

The previous prime is 28230211. The next prime is 28230227. The reversal of 28230226 is 62203282.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62203282 = 2 ⋅31101641.

It can be written as a sum of positive squares in only one way, i.e., 14175225 + 14055001 = 3765^2 + 3749^2 .

It is a super-2 number, since 2×28230226² = 1593891320022152, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28230226.

It is not an unprimeable number, because it can be changed into a prime (28230227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7057555 + ... + 7057558.

Almost surely, 2^28230226 is an apocalyptic number.

28230226 is a deficient number, since it is larger than the sum of its proper divisors (14115116).

28230226 is a wasteful number, since it uses less digits than its factorization.

28230226 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14115115.

The product of its (nonzero) digits is 2304, while the sum is 25.

The square root of 28230226 is about 5313.2123992929. The cubic root of 28230226 is about 304.4888904608.

The spelling of 28230226 in words is "twenty-eight million, two hundred thirty thousand, two hundred twenty-six".